Lenovo ThinkCentre M78 Hardware Maintenance Manual
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Lenovo ThinkCentre M78 Hardware Maintenance Manual

Lenovo ThinkCentre M78 Hardware Maintenance Manual

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ThinkCentre M78
Hardware Maintenance Manual
Machine Types: 1562, 1565, 1662, 1663, 1765, 1766, 2011, 2110,
2111, 2112, 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869,
5100, 10BN, 10BQ, 10BR, 10BS, 10BT, and 10BU

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Summary of Contents for Lenovo ThinkCentre M78

  • Page 1 ThinkCentre M78 Hardware Maintenance Manual Machine Types: 1562, 1565, 1662, 1663, 1765, 1766, 2011, 2110, 2111, 2112, 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10BN, 10BQ, 10BR, 10BS, 10BT, and 10BU...
  • Page 2 “Safety information” on page 3 and Appendix A “Notices” on page 193. Fourth Edition (January 2014) © Copyright Lenovo 2012, 2014. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.

  • Page 3: Table Of Contents

    Enabling ErP compliance mode ..Lenovo Support Web site ..ICE performance mode ...
  • Page 4 Completing the parts replacement ..Advanced Configuration and Power Interface (ACPI) BIOS ....Automatic Power-on features ..ThinkCentre M78 Hardware Maintenance Manual...
  • Page 5 Television output notice ... Index....European conformance CE mark ..© Copyright Lenovo 2012, 2014...
  • Page 6 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 7: Chapter 1. About This Manual

    This manual is intended only for trained service personnel who are familiar with Lenovo computer products. Before servicing a Lenovo computer product, be sure to read Chapter 2 “Safety information” on page 3. Chapter 7 “Symptom-to-FRU index” on page 61 and Chapter 11 “Additional service information” on page 189 are not specific to any machine type.
  • Page 8 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 9: Chapter 2. Safety Information

    Observe the following rules when working on electrical equipment. © Copyright Lenovo 2012, 2014...
  • Page 10 (This practice ensures correct grounding of the units.) • If an electrical accident occurs: – Use caution; do not become a victim yourself. – Switch off power. – Send another person to get medical aid. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 11: Voltage-Selection Switch

    Voltage-selection switch Some computers are equipped with a voltage-selection switch located near the power-cord connection point on the computer. If your computer has a voltage-selection switch, ensure that you set the switch to match the voltage available at your electrical outlet. Setting the voltage-selection switch incorrectly can cause permanent damage to the computer.

  • Page 12: Handling Electrostatic Discharge-Sensitive Devices

    Safety notices (multi-lingual translations) The caution and danger safety notices in this section are provided in the following languages: • English • Arabic • Brazilian/Portuguese • Chinese (simplified) • Chinese (traditional) ThinkCentre M78 Hardware Maintenance Manual...
  • Page 13 • French • German • Hebrew • Italian • Korean • Spanish DANGER Electrical current from power, telephone and communication cables is hazardous. To avoid a shock hazard: • Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
  • Page 14 The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 15 Chapter 2 Safety information...
  • Page 16 ≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) PERIGO A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 17 Para evitar risco de choque elétrico: • Não conecte nem desconecte nenhum cabo ou execute instalação, manutenção ou reconfiguração deste produto durante uma tempestade com raios. • Conecte todos os cabos de alimentação a tomadas elétricas corretamente instaladas e aterradas. •...
  • Page 18 O dispositivo também pode ter mais de um cabo de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que todos os cabos de alimentação estejam desconectados da fonte de alimentação. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 19 Chapter 2 Safety information...
  • Page 20 ThinkCentre M78 Hardware Maintenance Manual...
  • Page 21 Chapter 2 Safety information...
  • Page 22 • l'exposer à des températures supérieures à 100°C, • chercher à la réparer ou à la démonter. Ne pas mettre la pile à la poubelle. Pour la mise au rebut, se reporter à la réglementation en vigueur. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 23 ATTENTION: Si des produits à laser (tels que des unités de CD-ROM, de DVD-ROM, des unités à fibres optiques, ou des émetteurs) sont installés, prenez connaissance des informations suivantes : • Ne retirez pas le carter. En ouvrant l'unité de CD-ROM ou de DVD-ROM, vous vous exposez au rayonnement dangereux du laser.
  • Page 24 Lithiumbatterie, dieses nur durch ein Modul desselben Typs und von demselben Hersteller ersetzen. Die Batterie enthält Lithium und kann bei unsachgemäßer Verwendung, Handhabung oder Entsorgung explodieren. Die Batterie nicht: • mit Wasser in Berührung bringen. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 25 • über 100 C erhitzen. • reparieren oder zerlegen. Die örtlichen Bestimmungen für die Entsorgung von Sondermüll beachten. ACHTUNG: Bei der Installation von Lasergeräten (wie CD-ROM-Laufwerken, DVD- aufwerken, Einheiten mit Lichtwellenleitertechnik oder Sendern) Folgendes beachten: • Die Abdeckungen nicht entfernen. Durch Entfernen der Abdeckungen des Lasergeräts können gefährliche Laserstrahlungen freigesetzt werden.
  • Page 26 ThinkCentre M78 Hardware Maintenance Manual...
  • Page 27 Chapter 2 Safety information...
  • Page 28 • Riscaldarla ad una temperatura superiore ai 100 gradi C (212 gradi F) • Smontarla, ricaricarla o tentare di ripararla Le batterie usate vanno smaltite in accordo alla normativa in vigore (DPR 915/82 e successive disposizioni e disposizioni locali). ThinkCentre M78 Hardware Maintenance Manual...
  • Page 29 ATTENZIONE: Quando vengono installati prodotti laser (quali CD-ROM, unità DVD-ROM, unità a fibre ottiche o trasmittenti), tener presente quanto segue: • Non rimuovere gli sportelli. L'apertura di un'unità laser può determinare l'esposizione a radiazioni laser pericolose. All'interno dell'unità non vi sono parti su cui effettuare l'assistenza tecnica. •...
  • Page 30 ThinkCentre M78 Hardware Maintenance Manual...
  • Page 31 PELIGRO La corriente eléctrica procedente de cables de alimentación, teléfonos y cables de comunicación puede ser peligrosa. Para evitar el riesgo de descarga eléctrica: • No conecte ni desconecte los cables ni realice ninguna tarea de instalación, mantenimiento o reconfiguración de este producto durante una tormenta eléctrica. •...
  • Page 32 • No quite las cubiertas. Si quita las cubiertas del producto láser, podría quedar expuesto a radiación láser peligrosa. Dentro del dispositivo no existe ninguna pieza que requiera servicio técnico. • Si usa controles o ajustes o realiza procedimientos que no sean los especificados aquí, podría exponerse a radiaciones peligrosas. PELIGRO ThinkCentre M78 Hardware Maintenance Manual...
  • Page 33 Algunos productos láser tienen incorporado un diodo láser de clase 3A o clase 3B. Tenga en cuenta lo siguiente: Cuando se abre, queda expuesto a radiación láser. No mire directamente al rayo láser, ni siquiera con instrumentos ópticos, y evite exponerse directamente al rayo láser. ≥18 kg ≥32 kg ≥55 kg...
  • Page 34 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 35: Chapter 3. General Information

    – Low range: Minimum: 100 V ac Maximum: 127 V ac Input frequency range: 50 to 60 Hz – High range: Minimum: 200 V ac Maximum: 240 V ac Input frequency range: 50 to 60 Hz © Copyright Lenovo 2012, 2014...

  • Page 36: For Machine Types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10Bs, 10Bt, And 10Bu

    Input frequency range: 50 to 60 Hz Lenovo programs Your computer comes with Lenovo programs to help you work more easily and securely. Depending on the Windows operating system preinstalled, the programs might vary. Accessing Lenovo programs on the Windows 7 operating system On the Windows 7 operating system, you can access Lenovo programs from either the Lenovo ®...
  • Page 37 Note: If you do not find the program you need in Control Panel, open the Lenovo ThinkVantage Tools program navigation window and double-click the dimmed icon to install the program you need. Then, follow the instructions on the screen.

  • Page 38: Accessing Lenovo Programs On The Windows 8 Or Windows 8.1 Operating System

    • On the Windows 8.1 operating system, press the Windows key to go to the Start screen. Click a Lenovo program to launch it. If you cannot find the program you need, click the arrow icon in the bottom-left corner of the screen to go to the Apps screen. Find the desired program in the apps list or search for it in the search box in the top-right corner of the screen.

  • Page 39: Chapter 4. General Checkout

    Service Support and Engineering functions. • Machine type and model • Processor or hard disk drive upgrades • Failure symptom – Do diagnostics indicate a failure? – What, when, where, single, or multiple systems? – Is the failure repeatable? © Copyright Lenovo 2012, 2014...
  • Page 40 7. Have the same configuration options set in the system 8. Have the same setup for operating-system-controlled files Comparing the configuration and software set-up between “working and non-working” systems will often lead to problem resolution. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 41: Chapter 5. Troubleshooting And Diagnostics

    Chapter 5. Troubleshooting and diagnostics This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is not described here, see “Lenovo Support Web site” on page 32 for additional troubleshooting resources. Basic troubleshooting The following table provides information to help you troubleshoot your computer problems.

  • Page 42: Accessing Control Panel On The Windows 8 Or Windows 8.1 Operating System

    To restore a captured configuration, do the following: • For Windows 7: Click Start ➙ Control Panel ➙ System and Security ➙ System ➙ System Protection ➙ System Restore. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 43: Troubleshooting

    • If the diagnostic program detects a hardware failure, contact the Lenovo Customer Support Center. See “Lenovo Support Web site” on page 32 for more information. • If you are unable to run the diagnostic program, contact the Lenovo Customer Support Center. See “Lenovo Support Web site” on page 32 for more information.
  • Page 44 • Verify that the audio device drivers are correctly installed. See Microsoft Windows help system for more information. If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 45: Cd Problems

    Refer to the documentation that comes with the application or game for instructions on setting sound-card settings. • If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 46: Dvd Problems

    If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32. DVD problems Select your symptom from the following list: •...

  • Page 47: Intermittent Problems

    • Ensure that video resolution is set to less than 1152 x 864. If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 48: Keyboard, Mouse, Or Pointing Device Problems

    If these actions do not correct the problem, run the diagnostic program Lenovo Solution Center. See “Lenovo Solution Center” on page 53. If you need technical assistance, see “Lenovo Support Web site” on page 32. "No Operating System Found" message or the system not starting from the correct hard disk drive Symptom: "No Operating System Found"...
  • Page 49 See “Enabling or disabling a device” on page 57. If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 50: Monitor Problems

    If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 51: Networking Problems

    • See your operating system documentation or help for further information on monitor settings. If these actions do not correct the problem, your monitor might need service. See “Lenovo Support Web site” on page 32 for details.
  • Page 52 Symptom: The adapter stops working for no apparent reason. Action: The network driver files may be corrupt or missing. Update the driver by referring to the “Solution” description for the procedure to make sure that the correct device driver is installed. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 53: A Wireless Lan Problem

    The Wake on LAN feature is not working Symptom: The Wake on LAN (WOL) feature is not working. Actions: • Make sure that WOL is enabled in the BIOS Setup Utility program. • If it is, check with your LAN administrator for the necessary settings. If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails or errors occur Symptom: If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection...

  • Page 54: Option Problems

    If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 55: Performance And Lockup Problems

    If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32. Performance and lockup problems Poor performance and lockup problems can be a result of any of the following: •...

  • Page 56: Printer Problems

    32. For step-by-step instructions on installing memory, see “Installing or replacing a memory module” on page 85. If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 57: Serial Port Problems

    • Make sure that the serial-port adapter, if you added one, is properly installed and firmly seated. If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 32.

  • Page 58: Usb Problems

    If these actions do not correct the problem, run the diagnostic programs to test the USB connector (see “Lenovo Solution Center” on page 53 for instructions). If the USB device came with its own diagnostics, run those diagnostics against the USB device. If you need technical assistance, see “Lenovo Support Web site”...

  • Page 59: Diagnostics

    For additional information, refer to the Lenovo Solution Center help system. Note: If you are unable to isolate and repair the problem yourself after running the program, save and print the log files. You will need the log files when you speak to a Lenovo technical support representative. Chapter 5...
  • Page 60 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 61: Chapter 6. Using The Setup Utility Program

    Using passwords By using the Setup Utility program, you can set passwords to prevent unauthorized access to your computer and data. The following types of passwords are available: • Power-On Password © Copyright Lenovo 2012, 2014...

  • Page 62: Password Considerations

    • If the Hard Disk Password is forgotten, there is no way to reset the password or recover data from the hard disk drive. Setting, changing, and deleting a password To set, change, or delete a password, do the following: 1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 63: Erasing Lost Or Forgotten Passwords (Clearing Cmos)

    2. From the Setup Utility program main menu, select Security. 3. Depending on the password type, select Set Power-On Password, Set Administrator Password, or Hard Disk Password. 4. Follow the instructions on the right side of the screen to set, change, or delete a password. Note: A password can be any combination of up to 64 alphabetic and numeric characters.

  • Page 64: Selecting A Startup Device

    • Enabling the wake up on alarm feature The wake up on alarm feature enables your computer to wake up at a set time. To enable the wake up on alarm feature, do the following: ThinkCentre M78 Hardware Maintenance Manual...

  • Page 65: Ice Performance Mode

    1. Start the Setup Utility program. 2. From the Setup Utility program main menu, select Power ➙ Automatic Power On, and press Enter. 3. Select Wake Up on Alarm and press Enter. Then follow the instructions on the screen. 4. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to confirm the exit.

  • Page 66: Changing The Bios Settings Before Installing A New Operating System

    When the Reset Without Saving window shows, select Yes, and then press Enter to exit the Setup Utility program. • If you want to return to the default settings, press F9 to load the default settings, and then press F10 to save and exit the Setup Utility program. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 67: Chapter 7. Symptom-To-Fru Index

    Check the power cord for continuity. Power cord Check the power-on switch for continuity. Power-on switch Beep symptoms Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST. © Copyright Lenovo 2012, 2014...

  • Page 68: Post Error Codes

    0164 Memory size decreased This error message is displayed when the memory size has decreased. Press F1 to enter the Setup Utility program. Then press F10 to save and exit the Setup Utility program. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 69 POST Error code POST Error message Description/Action 1762 This error message is displayed when a hard disk Configuration change has occurred drive or optical drive change has been made. Press F1 to enter the Setup Utility program. Then press F10 to save and exit the Setup Utility program.

  • Page 70: Miscellaneous Error Messages

    Intensity or color varies from left to right of characters 1. Display and color bars 2. Video adapter (if present) 3. System Board No power or fan not running 1. See “Hard disk drive boot error” on page 61. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 71: Undetermined Problems

    Message/Symptom FRU/Action Non-system disk or disk error-type message with a 1. Diskette Drive known-good diagnostic diskette. 2. System Board 3. Diskette Drive Cable 1. Display Other display symptoms not listed above (including blank or illegible display) 2. System Board Power-on indicator or hard disk drive in-use light not on, 1.
  • Page 72 3. Turn on the power and the computer to re-test the system. 4. Repeat steps 1 through 3 until you find the failing device or adapter cards. If all devices and adapter cards have been removed, and the problem continues, replace the system board. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 73: Chapter 8. Locations

    Figure 1. Front connector, control, and indicator locations Hard disk drive activity indicator USB 2.0 connector (USB port 1) Power indicator Headphone connector Power switch Microphone connector Optical drive eject/close button USB 2.0 connector (USB port 2) © Copyright Lenovo 2012, 2014...

  • Page 74: Locating Connectors On The Rear Of Your Computer

    Locating major FRUs and CRUs Figure 3 “Locating major FRUs and CRUs” on page 69 shows the locations of the various components in your computer. To remove the computer cover, see “Removing the computer cover” on page 80. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 75 Figure 3. Locating major FRUs and CRUs The following table lists the major FRUs shown in Figure 3 “Locating major FRUs and CRUs” on page 69 and identifies which FRUs also are self-service CRUs or optional-service CRUs. Notes: Chapter 8 Locations...

  • Page 76: Looking Up Fru Information

    Memory modules Cover presence switch (intrusion switch) Rear fan assembly Microprocessor System board Keyboard Mouse Looking up FRU information For detailed FRU information, such as the FRU part numbers and supported computer models, go to: http:/www.lenovo.com/serviceparts-lookup ThinkCentre M78 Hardware Maintenance Manual...

  • Page 77: Locating Parts On The System Board

    Locating parts on the system board Figure 4 “System board part locations” on page 71 shows the locations of the parts on the system board. Figure 4. System board part locations 4-pin power connector Front panel connector (for connecting LED indicators and the power switch) Microprocessor Front USB connector 1 (for connecting USB ports 1 and 2...

  • Page 78: Locating Internal Drives

    Bay 4 - Secondary SATA hard disk drive bay (for installing a 3.5-inch SATA hard disk drive or a 2.5-inch SATA solid state drive) Bay 5 - Primary SATA hard disk drive bay (for installing a 3.5-inch SATA hard disk drive or a 2.5-inch SATA solid state drive) ThinkCentre M78 Hardware Maintenance Manual...

  • Page 79: For Machine Types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10Bs, 10Bt, And 10Bu

    For machine types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10BS, 10BT, and 10BU Locating connectors, controls, and indicators on the front of your computer Figure 6 “Front connector, control, and indicator locations” on page 73 shows the locations of the connectors, controls, and indicators on the front of your computer.

  • Page 80: Locating Connectors On The Rear Of Your Computer

    Figure 8 “Locating major FRUs and CRUs” on page 75 shows the locations of the major FRUs and CRUs in the computer. To open the computer cover, see “Opening the computer cover” on page 136. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 81 Figure 8. Locating major FRUs and CRUs The following table lists the major FRUs shown in Figure 8 “Locating major FRUs and CRUs” on page 75 and identifies which FRUs also are self-service CRUs or optional-service CRUs. Notes: • Self-service CRUs: These CRUs unplug or are secured by no more than two screws. Examples of these types of CRUs include the keyboard, the mouse, any USB device, and the power cord.

  • Page 82: Looking Up Fru Information

    WiFi adapter card Rear WiFi antenna Peripheral Component Interconnect (PCI) card System board Microprocessor Keyboard Mouse Looking up FRU information For detailed FRU information, such as the FRU part numbers and supported computer models, go to: http:/www.lenovo.com/serviceparts-lookup ThinkCentre M78 Hardware Maintenance Manual...

  • Page 83: Locating Parts On The System Board

    Locating parts on the system board Figure 9 “System board part locations” on page 77 shows the locations of the parts on the system board. Figure 9. System board part locations 4-pin power connector Front panel connector (for connecting LED indicators and the power switch) Microprocessor Front USB connector 1 (for connecting USB ports 1 and 2...

  • Page 84: Locating Internal Drives

    Bay 1 - Optical drive bay (with an optical drive installed) Bay 2 - Card reader drive bay or mSATA solid state drive bay Bay 3 - SATA hard disk drive bay (with a 3.5-inch hard disk drive or a 2.5-inch solid state drive installed) ThinkCentre M78 Hardware Maintenance Manual...

  • Page 85: Chapter 9. Replacing Frus (Machine Types: 1562, 1565, 1662, 1663, 1765, 1766, 2011, 2110, 2111, 2112, 10Bn, 10Bq, And 10Br)

    Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. Notes: 1. Use only computer parts provided by Lenovo. 2. When installing or replacing an option, use the appropriate instructions in this section along with the instructions that come with the option.

  • Page 86: Removing The Computer Cover

    67 and “Locating connectors on the rear of your computer” on page 68. 4. Remove any locking device that secures the computer cover, such as a padlock or an integrated cable lock. 5. Remove any screws that secure the computer cover. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 87: Removing And Reinstalling The Front Bezel

    6. Press the cover-release button on the side of the computer and slide the cover to the rear of the computer to remove the cover. Figure 11. Removing the computer cover Removing and reinstalling the front bezel Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1.

  • Page 88: Installing Or Replacing A Pci Card

    To install or replace a PCI card, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Remove the computer cover. See “Removing the computer cover” on page 80. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 89 3. At the rear of the computer, press the release button to open the card latch Figure 13. Opening the PCI card latch 4. Depending on whether you are installing or replacing a PCI card, do one of the following: •...
  • Page 90 6. Install the new card into the appropriate slot on the system board. See “Locating parts on the system board” on page 71. Note: If you are installing a PCI Express x16 graphics card, ensure that the memory slot retaining clips are closed before you install the graphics card. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 91: Installing Or Replacing A Memory Module

    7. Pivot the card latch to the closed position to secure the PCI card. Figure 15. Installing a PCI card What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to “Completing the parts replacement” on page 132. Installing or replacing a memory module Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information”...
  • Page 92 6. Depending on whether you are installing or replacing a memory module, do one of the following: • If you are replacing an old memory module, open the retaining clips and gently pull the memory module out of the memory slot. Figure 16. Removing a memory module ThinkCentre M78 Hardware Maintenance Manual...

  • Page 93: Installing Or Replacing The Optical Drive

    • If you are installing a memory module, open the retaining clips of the memory slot into which you want to install the memory module. Figure 17. Opening the retaining clips 7. Position the new memory module over the memory slot. Ensure that the notch on the memory module aligns correctly with the slot key on the system board.
  • Page 94 Figure 19. Removing the optical drive 5. Install the optical drive retainer on the side of the new optical drive. Figure 20. Installing the optical drive retainer ThinkCentre M78 Hardware Maintenance Manual...

  • Page 95: Installing Or Replacing The Card Reader

    6. Slide the new optical drive into the drive bay from the front of the computer until the optical drive snaps into position. Figure 21. Installing the optical drive 7. Connect the signal cable and the power cable to the new optical drive. Figure 22.

  • Page 96: Installing The Card Reader

    5. Pivot the card reader retainer to the left and slide it out of the chassis. Figure 23. Removing the card reader retainer 6. Install the card reader retainer on the side of the new card reader. Figure 24. Installing the card reader retainer ThinkCentre M78 Hardware Maintenance Manual...
  • Page 97 7. Slide the card reader with retainer into the card reader drive bay until it snaps into position. Figure 25. Installing the card reader 8. Connect the card reader cable to front USB connector 2 on the system board. See “Locating parts on the system board”...

  • Page 98: Replacing The Card Reader

    6. Press the blue retaining clip to remove the card reader out of the chassis. Figure 27. Removing the card reader 7. Install the card reader retainer on the side of the new card reader. Figure 28. Installing the card reader retainer ThinkCentre M78 Hardware Maintenance Manual...

  • Page 99: Replacing The Power Switch Unit

    8. Slide the new card reader into the drive bay until it snaps into position. Figure 29. Installing the card reader 9. Reconnect the card reader cable to front USB connector 2 on the system board. See “Locating parts on the system board”...
  • Page 100 6. Remove the two screws that secure the handle to the top-front edge of the chassis. Figure 30. Removing the screws for the handle 7. Lift the handle off the chassis and flip the handle over. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 101 8. Remove the two screws on the back of the handle. Pull the top of the triangular area on either side of the front cover and lift the back cover off. Figure 31. Disassembling the handle 9. Lift the power switch circuit board and the power switch cable from the back cover, release the cable from the cable clips in the chassis, and then remove the entire power switch unit from the computer chassis.
  • Page 102 Figure 32. Installing the new power switch unit 11. Assemble the handle back cover and front cover, and install the two screws to secure the front and back covers together. Figure 33. Installing the handle back cover ThinkCentre M78 Hardware Maintenance Manual...

  • Page 103: Replacing The Battery

    12. Flip the handle over, align the two feet of the handle with the two holes in the top-front of the chassis. 13. Install the two screws to secure the handle to the chassis. Figure 34. Installing the screws for the handle 14.

  • Page 104: Replacing The Power Supply Assembly

    Replacing the power supply assembly Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the power supply assembly. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 105 Although there are no moving parts in your computer after the power cord has been disconnected, the following warnings are required for your safety and proper Underwriters Laboratories (UL) certification. CAUTION: Hazardous moving parts. Keep fingers and other body parts away. CAUTION: Never remove the cover on a power supply or any part that has the following label attached.

  • Page 106: Replacing The Heat Sink And Fan Assembly

    9. Install and tighten the four screws to secure the power supply assembly. Note: Use only screws provided by Lenovo. 10. Reconnect the power supply assembly cables to the system board and each of the drives.
  • Page 107 To replace the heat sink and fan assembly, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Remove the computer cover. See “Removing the computer cover” on page 80. 3. Lay the computer on its side for easier access to the system board. 4.

  • Page 108: Replacing The Microprocessor

    5. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 100. Note: Place the heat sink and fan assembly on its side so that the thermal grease on the bottom of it does not get in contact with anything. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 109 6. Lift the small handle to release the microprocessor secured on the system board. Figure 39. Accessing the microprocessor 7. Lift the microprocessor straight up and out of the microprocessor socket. Figure 40. Removing the microprocessor Notes: a. Your microprocessor and socket might look different from the one illustrated. b.

  • Page 110: Replacing The System Board

    See “Locating parts on the system board” on page 71. 6. Remove the heat sink and fan assembly from the failing system board. See “Replacing the heat sink and fan assembly” on page 100. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 111: Replacing The Primary Hard Disk Drive

    7. Remove the eight screws that secure the system board. Figure 41. Removing the eight screws that secure the system board 8. Carefully slide the system board so that it can be released from the mounting studs that secure the system board in place.
  • Page 112 5. Pull the blue handle to release and remove the hard disk drive from the drive cage. Figure 42. Removing the primary hard disk drive 6. Flex the sides of the blue bracket to remove the hard disk drive from the bracket. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 113 7. To install a new hard disk drive into the blue bracket, flex the bracket and align pin , pin , pin and pin on the bracket with the corresponding holes in the hard disk drive. Do not touch the circuit board on the bottom of the hard disk drive.

  • Page 114: Replacing The Secondary Hard Disk Drive

    5. Pull the blue handle to release and remove the hard disk drive from the hard disk drive cage. Figure 45. Removing the secondary hard disk drive 6. Flex the sides of the blue bracket to remove the hard disk drive from the bracket. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 115 7. To install a new hard disk drive into the blue bracket, flex the bracket and align pin , pin , pin and pin on the bracket with the corresponding holes in the hard disk drive. Do not touch the circuit board on the bottom of the hard disk drive.

  • Page 116: Installing The Solid State Drive

    1. Install the solid state drive into the storage converter. Then, install the four screws to secure the solid state drive to the storage converter. Figure 48. Installing the solid state drive into the storage converter ThinkCentre M78 Hardware Maintenance Manual...

  • Page 117: Replacing The Front Fan Assembly

    2. To install the solid state drive with the storage converter into the 3.5-inch hard disk drive bracket, flex the bracket and align pin , pin , pin , and pin on the bracket with the corresponding holes in the storage converter. Figure 49.
  • Page 118 Figure 50. Removing the front fan assembly 6. Install the new front fan assembly by aligning the new rubber mounts with the corresponding holes in the chassis and push the rubber mounts through the holes. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 119: Replacing The Rear Fan Assembly

    7. Pull the tips of the rubber mounts until the front fan assembly is secured in place. Figure 51. Installing the front fan assembly 8. Connect the front fan assembly cable to the power fan connector on the system board. 9.
  • Page 120 Figure 52. Removing the rear fan assembly 6. Install the new rear fan assembly by aligning the new rubber mounts with the corresponding holes in the chassis and push the rubber mounts through the holes. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 121: Replacing The Front Audio And Usb Assembly

    7. Pull the tips of the rubber mounts until the rear fan assembly is secured in place. Figure 53. Installing the rear fan assembly 8. Connect the rear fan assembly cable to the system fan connector on the system board. What to do next: •...

  • Page 122: Replacing The Internal Speaker

    • To complete the installation or replacement, go to “Completing the parts replacement” on page 132. Replacing the internal speaker Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 123 This section provides instructions on how to replace the internal speaker. Note: The internal speaker is only available on some models. To replace the internal speaker, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2.

  • Page 124: Replacing The Thermal Sensor

    4. Locate the thermal sensor. See “Locating major FRUs and CRUs” on page 68. 5. Disconnect the thermal sensor cable from the thermal sensor connector on the system board. See “Locating parts on the system board” on page 71. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 125 6. From inside the chassis, pivot the upper retaining clip that secures the plastic holder of the thermal sensor downward and then push the clip outward to release the clip. Then disengage the plastic holder holding the thermal sensor from the chassis. Figure 57.

  • Page 126: Replacing The Cover Presence Switch

    4. Locate the cover presence switch. See “Locating major FRUs and CRUs” on page 68. 5. Disconnect the cover presence switch cable from the cover presence switch connector on the system board. See “Locating parts on the system board” on page 71. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 127 6. Remove the screw that secures the cover presence switch and remove the cover presence switch from the chassis. Figure 59. Removing the cover presence switch Chapter 9 Replacing FRUs (machine types: 1562, 1565, 1662, 1663, 1765, 1766, 2011, 2110, 2111, 2112, 10BN, 10BQ, and 10BR)

  • Page 128: Replacing The Wifi Units

    WiFi card module, and a rear WiFi antenna cable. Replacing the WiFi units involves the following operations: • “Removing the WiFi adapter card” on page 123 • “Removing the WiFi card module” on page 124 • “Installing the WiFi units” on page 125 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 129: Removing The Wifi Adapter Card

    Removing the WiFi adapter card To remove a WiFi adapter card, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Remove the computer cover. See “Removing the computer cover” on page 80. 3.
  • Page 130 To remove the WiFi card module, do the following: 1. Remove the WiFi adapter card from the computer, and then disconnect the front and rear WiFi antenna cables from the WiFi card module. Figure 63. Removing the WiFi antenna cables ThinkCentre M78 Hardware Maintenance Manual...
  • Page 131 2. Remove the two screws that secure the WiFi card module to the WiFi adapter card. Figure 64. Removing the screws that secure the WiFi card module 3. Pull the WiFi card module out of the mini PCI Express slot to remove it from the WiFi adapter card. Figure 65.
  • Page 132 1. Insert the WiFi card module into the mini PCI Express slot, and then install the two screws to secure the WiFi card module to the WiFi adapter card. Figure 66. Installing the WiFi card module ThinkCentre M78 Hardware Maintenance Manual...
  • Page 133 2. Connect the front antenna cable and rear antenna cable to the WiFi card module. Figure 67. Installing the WiFi antenna cables 3. Install the WiFi adapter card into the PCI Express x1 slot on the system board. See “Locating parts on the system board”...

  • Page 134: Installing Or Removing The Rear Wifi Antenna

    To remove the rear WiFi antenna, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Straighten the rear WiFi antenna so that it can be more easily twisted. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 135: Installing Or Removing The Front Wifi Antenna

    3. Hold the thicker end of the rear WiFi antenna and unscrew the WiFi antenna from the rear of the computer. Figure 70. Removing the rear WiFi antenna What to do next: • To work with another piece of hardware, go to the appropriate section. •...
  • Page 136 5. Stick the front antenna to the front panel as shown. Then insert the front antenna cable through the hole in the front panel. Figure 72. Installing the front WiFi antenna 6. Connect the front antenna cable to the WiFi card module. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 137: Replacing The Keyboard Or Mouse

    What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to “Completing the parts replacement” on page 132. Removing the front WiFi antenna To remove the front WiFi antenna, do the following: 1.

  • Page 138: Completing The Parts Replacement

    81. 3. Ensure that the cables are routed correctly before reinstalling the computer cover. Keep cables clear of the hinges and sides of the computer chassis to avoid interference with reinstalling the computer cover. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 139: Obtaining Device Drivers

    9. To update your configuration, refer to Chapter 6 “Using the Setup Utility program” on page 55. Note: In most areas of the world, Lenovo requires the return of the defective Customer Replaceable Unit (CRU). Information about this will come with the CRU or will come a few days after the CRU arrives.
  • Page 140 ThinkCentre M78 Hardware Maintenance Manual...

  • Page 141: Chapter 10. Replacing Frus (Machine Types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10Bs, 10Bt, And 10Bu)

    Notes: 1. Use only computer parts provided by Lenovo. 2. When installing or replacing an option, use the appropriate instructions in this section along with the instructions that come with the option.

  • Page 142: Opening The Computer Cover

    Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to remove and reinstall the front bezel. To remove and reinstall the front bezel, do the following: ThinkCentre M78 Hardware Maintenance Manual...
  • Page 143 1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer. 2. Open the computer cover. See “Opening the computer cover” on page 136. 3.

  • Page 144: Accessing The System Board Components And Drives

    3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 81. 4. Remove the heat sink fan duct. See “Replacing the heat sink and fan assembly” on page 100. 5. Remove the hard disk drive. See “Replacing the primary hard disk drive” on page 105. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 145: Installing Or Replacing A Memory Module

    6. Pivot the optical drive bay upward to access the system board components and the cables. See “Replacing the optical drive” on page 156. Installing or replacing a memory module Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1.
  • Page 146 Figure 79. Removing a memory module • If you are installing a memory module, open the retaining clips of the memory slot into which you want to install the memory module. Figure 80. Opening the retaining clips ThinkCentre M78 Hardware Maintenance Manual...

  • Page 147: Installing Or Replacing A Pci Card

    10. Position the new memory module over the memory slot. Ensure that the notch on the memory module aligns correctly with the slot key on the system board. Push the memory module straight down into the slot until the retaining clips close. Figure 81.
  • Page 148 If the card is held in place by a retaining latch, press the card retaining latch as shown to disengage the latch. Grasp the card and gently pull it out of the slot. 5. Remove the new PCI card from its static-protective package. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 149: Installing Or Replacing The Card Reader

    6. Install the new card into the appropriate card slot on the system board and rotate the card retainer to the closed position. See “Locating parts on the system board” on page 71. Figure 83. Installing the PCI card What to do next: •...
  • Page 150 6. Install the card reader bracket to the chassis. Then push the bracket to the left to align the screw hole in the bracket with the corresponding hole in the chassis. Figure 84. Installing the card reader ThinkCentre M78 Hardware Maintenance Manual...
  • Page 151 7. Install the screw to secure the card reader bracket to the chassis. Figure 85. Installing the screw that secures the card reader 8. Connect the card reader cable to one of the USB connectors on the system board. See “Locating parts on the system board”...
  • Page 152 7. Remove the two screws that secure the card reader to its bracket. Then remove the failing card reader from the bracket. 8. Install a new card reader into the bracket and install the two screws to secure the card reader to the bracket. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 153 9. Install the card reader bracket to the chassis. Then push the bracket to the left to align the screw hole in the bracket with the corresponding hole in the chassis. Figure 88. Installing the card reader Chapter 10 Replacing FRUs (machine types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10BS, 10BT, and 10BU)

  • Page 154: Replacing The Power Switch Unit

    2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4. Locate the power switch unit. See “Locating major FRUs and CRUs” on page 74. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 155 5. Pivot the optical drive upward and disconnect the power switch cable from the front panel connector on the system board. See “Locating parts on the system board” on page 77. 6. Push the power switch unit inward through the hole to disengage it from the chassis. Figure 90.

  • Page 156: Replacing The Battery

    The battery normally requires no charging or maintenance throughout its life; however, no battery lasts forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An error message is displayed when you turn on the computer. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 157: Replacing The Hard Disk Drive

    Refer to the “Lithium coin cell battery notice” in the Safety, Warranty, and Setup Guide for information about replacing and disposing of the battery. To replace the battery, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2.
  • Page 158 Figure 94. Removing the hard disk drive 5. Disconnect the signal cable and the power cable from the hard disk drive to completely remove the hard disk drive from the chassis. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 159 6. Flex the retaining clips as shown to remove the hard disk drive from the bracket. Figure 95. Removing the hard disk drive from the bracket 7. To install a new hard disk drive into the bracket, flex the bracket and align pin , pin , pin , and pin...

  • Page 160: Installing The Solid State Drive

    Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to install the 2.5-inch solid state drive into the 3.5-inch hard disk drive bracket. To install the solid state drive, do the following: ThinkCentre M78 Hardware Maintenance Manual...
  • Page 161 1. Install the solid state drive into the adapter. Then, install the four screws to secure the solid state drive to the adapter. Figure 97. Installing the solid state drive into the adapter 2. To install the solid state drive with the adapter into the 3.5-inch hard disk drive bracket, flex the bracket and align pin , pin , pin...

  • Page 162: Replacing The Optical Drive

    5. Press the blue retaining clip to pivot the optical drive bay upward. Figure 99. Pivoting the optical drive bay 6. Disconnect the signal cable and the power cable from the rear of the optical drive. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 163 7. Press the optical drive lock and slide the optical drive out of the rear of the drive bay assembly. Figure 100. Removing the old optical drive 8. Install the optical drive retainer on the side of the new optical drive. Figure 101.

  • Page 164: Replacing The Heat Sink And Fan Assembly

    1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer. 2. Open the computer cover. See “Opening the computer cover” on page 136. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 165 3. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 71. 4. Follow this sequence to remove the four screws that secure the heat sink and fan assembly to the system board: a.
  • Page 166 , and then fully tighten screw 9. Connect the new heat sink and fan assembly cable to the microprocessor fan connector on the system board. See “Locating parts on the system board” on page 77. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 167: Replacing The Power Supply Assembly

    10. Lower and position the heat sink fan duct on the top of the heat sink and fan assembly until the two screw holes in the heat sink fan duct are aligned with those in the heat sink and fan assembly. Install the two screws to secure the heat sink fan duct.
  • Page 168 2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4. Remove the hard disk drive. See “Replacing the hard disk drive” on page 151. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 169 5. Remove the two screws that secure the heat sink fan duct, and then lift the heat sink fan duct out of the chassis. Figure 106. Removing the heat sink fan duct Chapter 10 Replacing FRUs (machine types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10BS, 10BT, and 10BU)
  • Page 170 Note: You might also need to release the power supply assembly cables from some cable clips or ties that secure the cables to the chassis. Ensure that you note the cable routing before disconnecting the cables. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 171 Then, install the three screws to secure the new power supply assembly in place. Note: Use only screws provided by Lenovo. Figure 109. Installing the power supply assembly 10.

  • Page 172: Replacing The Microprocessor

    1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer. 2. Open the computer cover. See “Opening the computer cover” on page 136. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 173 3. Locate the system board and disconnect all cables connected to the system board. See “Locating parts on the system board” on page 77. 4. Remove the heat sink and fan assembly with the fan duct. See “Replacing the heat sink and fan assembly”...
  • Page 174 12. Reinstall the heat sink and fan assembly with the fan duct as shown. See “Replacing the heat sink and fan assembly” on page 158. Figure 113. Reinstalling the heat sink and fan assembly with the fan duct ThinkCentre M78 Hardware Maintenance Manual...

  • Page 175: Replacing The System Board

    13. Reconnect all cables that were disconnected from the system board. What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the replacement, go to “Completing the parts replacement” on page 187. Replacing the system board Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information”...

  • Page 176: Replacing The Cover Presence Switch

    Replacing the cover presence switch Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the cover presence switch (intrusion switch). ThinkCentre M78 Hardware Maintenance Manual...
  • Page 177 To replace the cover presence switch, do the following: 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4.

  • Page 178: Replacing The Internal Speaker

    Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the internal speaker. Note: The internal speaker is only available in some models. To replace the internal speaker, do the following: ThinkCentre M78 Hardware Maintenance Manual...
  • Page 179 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4.

  • Page 180: Replacing The Thermal Sensor

    Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the thermal sensor. To replace the thermal sensor, do the following: ThinkCentre M78 Hardware Maintenance Manual...
  • Page 181 1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4.
  • Page 182 12. Reinstall the front bezel. See “Removing and reinstalling the front bezel” on page 136. What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to “Completing the parts replacement” on page 187. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 183: Replacing The Front Audio And Usb Assembly

    Replacing the front audio and USB assembly Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the front audio and USB assembly. To replace the front audio and USB assembly, do the following: 1.

  • Page 184: Replacing The Wifi Units

    1. Turn off the computer and disconnect all power cords from electrical outlets. 2. Open the computer cover. See “Opening the computer cover” on page 136. 3. Rotate the PCI card retainer to the open position. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 185 4. Grasp the WiFi adapter card that is currently installed and gently pull it out of the slot. Figure 122. Removing the WiFi adapter card Note: The card fits tightly into the card slot. If necessary, alternate moving each side of the card a small amount until it is removed from the card slot.
  • Page 186 3. Pull the WiFi card module out of the mini PCI Express slot to remove it from the WiFi adapter card. Figure 125. Removing the WiFi card module Installing the WiFi units To install the WiFi units, do the following: ThinkCentre M78 Hardware Maintenance Manual...
  • Page 187 1. Insert the WiFi card module into the mini PCI Express slot, and then install the two screws to secure the WiFi card module to the WiFi adapter card. Figure 126. Installing the WiFi card module 2. Connect the front antenna cable and rear antenna cable to the WiFi card module. Figure 127.

  • Page 188: Installing Or Removing The Rear Wifi Antenna

    2. Install the rear WiFi antenna to the rear WiFi antenna cable connector attached on the rear of the computer. 3. Adjust the angle of the rear antenna to lower the risk of breaking the antenna by accident. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 189: Removing The Rear Wifi Antenna

    Figure 129. Installing the rear WiFi antenna What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to “Completing the parts replacement” on page 187. Removing the rear WiFi antenna To remove the rear WiFi antenna, do the following: 1.

  • Page 190: Installing Or Removing The Front Wifi Antenna

    3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 136. 4. Remove the hard disk drive. See “Replacing the hard disk drive” on page 151. 5. Peel off the paper that protects the stickers on the front antenna. ThinkCentre M78 Hardware Maintenance Manual...
  • Page 191 Figure 131. Peeling off the paper that protects the stickers 6. Stick the front antenna to the front panel as shown. Then insert the front antenna cable through the hole in the front panel. Figure 132. Installing the front WiFi antenna Chapter 10 Replacing FRUs (machine types: 2113, 2114, 2115, 3515, 4860, 4863, 4865, 4866, 4869, 5100, 10BS, 10BT, and 10BU)

  • Page 192: Removing The Front Wifi Antenna

    Figure 133. Removing the front WiFi antenna What to do next: • To work with another piece of hardware, go to the appropriate section. • To complete the installation or replacement, go to “Completing the parts replacement” on page 187. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 193: Replacing The Keyboard Or Mouse

    Replacing the keyboard or mouse Attention: Do not open your computer or attempt any repair before reading and understanding “Important safety information” on page 1. This section provides instructions on how to replace the keyboard or mouse. To replace the keyboard or mouse, do the following: 1.
  • Page 194 8. To update your configuration, see Chapter 6 “Using the Setup Utility program” on page 55. Note: In most areas of the world, Lenovo requires the return of the defective Customer Replaceable Unit (CRU). Information about this will come with the CRU or will come a few days after the CRU arrives.

  • Page 195: Chapter 11. Additional Service Information

    “Using passwords” on page 55. Operating system password Note: This section applies only to computer models that have an operating system preinstalled from Lenovo. An operating system password is very similar to a power-on password and denies access to the computer by an unauthorized user when the password is activated.

  • Page 196: Updating (Flashing) The Bios From A Disc

    Note: You can download a self-starting bootable disc image (known as an ISO image) with the system program updates to create a system-program-update disc. Go to http://www.lenovo.com/support. To update (flash) the BIOS from a disc on the Windows 8 (64-bit) or Windows 8.1 (64-bit) operating system, do the following: 1.

  • Page 197: Updating (Flashing) The Bios From Your Operating System

    Updating (flashing) the BIOS from your operating system Note: Because Lenovo makes constant improvements to its Web sites, the Web page contents are subject to change without notice, including the contents referenced in the following procedure. To update (flash) the BIOS from your operating system, do the following: 1.

  • Page 198: Power Management

    • For Windows 8.1: Click Choose what the power button does. 4. In the Shutdown setting section, clear Turn on fast startup. Note: If the settings are unavailable, click Change settings that are currently unavailable. 5. Click Save changes. ThinkCentre M78 Hardware Maintenance Manual...

  • Page 199: Appendix A. Notices

    Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead.

  • Page 200: Trademarks

    Macrovision Corporation. Reverse engineering or disassembly is prohibited. European conformance CE mark Trademarks The following terms are trademarks of Lenovo in the United States, other countries, or both: Lenovo The Lenovo logo Rescue and Recovery...

  • Page 201: Index

    72, 78 specifications 72, 78 memory module installing, replacing 85, 139 system board 85, 139 microprocessor environment, operating 29–30 replacing 102, 166 exiting, Setup Utility mouse, replacing 131, 187 external options, installing 79, 135 © Copyright Lenovo 2012, 2014...
  • Page 202 WiFi units, WiFi adapter card, WiFi card module, WiFi antenna cable, replacing WiFi units, WiFi adapter card, WiFi card module, WiFi security antenna cable, replacing enabling or disabling selecting startup device temporary startup device Self-service CRUs 68, 74 ThinkCentre M78 Hardware Maintenance Manual...

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