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Lenovo ThinkPad T431s Maintenance Manual

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  • Page 1 Hardware Maintenance Manual ThinkPad T431s...
  • Page 2 Appendix A “Notices” on page 91. Fifth Edition (August 2015) © Copyright Lenovo 2013, 2015. 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

    LCD FRUs ....Lenovo Solution Center ..Miscellaneous parts and other FRUs ..Quick test programs...
  • Page 4 1040 M.2 wireless WAN card ..1180 Smart card bezel ... 1050 Memory module ... . 1190 Keyboard bezel assembly .

  • Page 5: About This Manual

    Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information” on page 1 and Chapter 2 “Important service information” on page 19. © Copyright Lenovo 2013...
  • Page 6 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Safety Information

    Do not use this type of mat to protect yourself from electrical shock. © Copyright Lenovo 2013...

  • Page 8: Safety Inspection Guide

    • Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly. • Do not work alone under hazardous conditions or near equipment that has hazardous voltages. •...

  • Page 9: Handling Devices That Are Sensitive To Electrostatic Discharge

    0.1 ohm or less between the external ground pin and the frame ground. b. The power cord should be the authorized type specified for your computer. Go to: http://www.lenovo.com/serviceparts-lookup c. Insulation must not be frayed or worn. 4. Check for cracked or bulging batteries.

  • Page 10: Grounding Requirements

    – When working on a double-insulated or battery-operated system, use an ESD common ground or reference point. You can use coax or connector-outside shells on these systems. – Use the round ground prong of the ac plug on ac-operated computers. Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function.
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO DANGER DANGER Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 VORSICHT VORSICHT VORSICHT VORSICHT Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Hardware Maintenance Manual...

  • Page 25: Chapter 2. Important Service Information

    UEFI BIOS downloads. Telephone numbers for Lenovo Support are available at: http://www.lenovo.com/support/phone • System Disassembly/Reassembly videos that show the FRU removals or replacements for the Lenovo authorized service technicians are available in the following support site: http://www.lenovoservicetraining.com/ion/...

  • Page 26: Important Notice For Replacing A System Board

    Dynamic Configure To Order (CTO) model This model provides the ability for a customer to configure a Lenovo solution from a Web Site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.
  • Page 27 FRU list for a product. To get the general FRU list for a product, do the following: 1. Go to: http://www.lenovo.com/support 2. Click Parts & Accessories. 3. Follow the instructions on the screen to select product.
  • Page 28 Hardware Maintenance Manual...

  • Page 29: Chapter 3. General Checkout

    This chapter introduces following information: • “What to do first” on page 23 • “Checkout guide” on page 24 – “Lenovo Solution Center” on page 24 – “Quick test programs” on page 24 – “UEFI diagnostic program” on page 25 –...

  • Page 30: Checkout Guide

    The Lenovo Solution Center program is available for download at http://www.lenovo.com/diags. To run the Lenovo Solution Center program, go to Control Panel and click System and Security ➙ Lenovo - System Health and Diagnostics, and then follow the instructions on the screen.

  • Page 31: Uefi Diagnostic Program

    • Microsoft Windows Server 2003 • Microsoft Windows Server 2008 To download and install a quick test program, go to http://www.lenovo.com/diags, and follow the instructions on the Web site. To run a test using quick test program, do the following: 1.

  • Page 32: Power System Checkout

    1. Go to http://www.lenovo.com/diags. 2. Click Lenovo Bootable Diagnostics. 3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or CD. To use the diagnostic medium you have created, do one of the following: •...

  • Page 33: Checking The Built-In Battery And Operational Charging

    To check for detailed battery status information, do the following: • For Windows 7: Open the Power Manager program and click the Battery tab. • For Windows 8: Open the Lenovo Support program and click Battery Health, or open the Lenovo Settings program and click Power.
  • Page 34 1. Disable the built-in battery. See “Disabling the built-in battery” on page 56. 2. Remove the backup battery. See “1070 Battery pack” on page 63. 3. Measure the voltage of the backup battery. See the following illustration. Wire Voltage (V dc) +2.5 to +3.2 Black Ground...

  • Page 35: Chapter 4. Related Service Information

    “Symptom-to-FRU index” on page 34 Service Web site: When the latest maintenance diskette and the system program service diskette become available, they will be posted on http://www.lenovo.com/support Restoring the factory contents by using the Recovery Disc Set When the main storage drive is replaced because of a failure, no product recovery program is on the new drive.

  • Page 36: Using The Windows Recovery Programs On The Windows 8 Operating System

    4. Select your language and click Next. 5. Read the license. If you agree with the terms and conditions, select I accept these terms and conditions and then click Next. If you do not agree with the terms and conditions, follow the instructions on the screen.

  • Page 37: Passwords

    If it has, it can be used for access to the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.

  • Page 38: Supervisor Password

    To put the system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to replace the hard disk drive or solid-state drive with a scheduled fee.

  • Page 39: Power Management

    4. Select Password. 5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. 6. Select Master hard disk password. 7. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter New Password field blank, and press Enter twice.

  • Page 40: Hibernation Mode

    • The time set on the resume timer elapses. Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any action to reenter operation mode. Hibernation mode In hibernation mode, the following occurs: •...

  • Page 41: Numeric Error Codes

    Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual for that device. Numeric error codes Table 2. Numeric error codes Symptom or error FRU or action, in sequence 0177 Replace the system board. Bad SVP data, stop POST task—The checksum of the supervisor password in the EEPROM is not correct.

  • Page 42: Error Messages

    The battery installed is not supported by this system Replace the battery. and will not charge. Please replace the battery with the correct Lenovo battery for this system. Press the ESC key to continue. This system does not support batteries that are not Replace the battery.

  • Page 43: No-Beep Symptoms

    LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced. Notes: •...

  • Page 44: Intermittent Problems

    Intermittent problems Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a problem recurs. When analyzing an intermittent problem, do the following: 1.

  • Page 45: Chapter 5. Status Indicators

    This chapter presents the status indicators that show the status of the computer. Table 7. Status indicators Indicator Meaning Speaker mute indicator On: The speakers are muted. Microphone mute indicator On: The microphones are muted. Camera status indicator On: The camera is in use. © Copyright Lenovo 2013...
  • Page 46 Table 7. Status indicators (continued) Indicator Meaning Blinking three times: The computer is initially connected to power. System status indicator On: The computer is in use. Off: The computer is off or in hibernation mode. Slow blinking: The computer is in sleep mode. Fast blinking: The computer is entering hibernation mode.

  • Page 47: Chapter 6. Function Keys

    Has the same function as the Pause key on a conventional keyboard. Fn+S Has the same function as the SysRq key on a conventional keyboard. Fn+K Has the same function as the ScrLK key on a conventional keyboard. © Copyright Lenovo 2013...
  • Page 48 Hardware Maintenance Manual...

  • Page 49: Chapter 7. Locations

    This topic introduces the locations of the computer controls, connectors, and indicators. Front view Mini DisplayPort connector Camera (on some models) Microphones Always On USB 3.0 connector Power button Fingerprint reader (on some models) ® Security keyhole TrackPoint pointing stick Fan louvers Touch pad © Copyright Lenovo 2013...

  • Page 50: Rear View

    Rear view Smart card slot (on some models) VGA connector Combo audio jack Ethernet connector Media card reader slot Power connector USB 3.0 connector SIM card tray Bottom view Docking station connector Speakers Emergency reset hole Fan louvers Hardware Maintenance Manual...

  • Page 51: Locating Frus And Crus

    CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request.

  • Page 52: Major Frus

    Major FRUs Table 9. Major FRUs FRU descriptions Self-service Optional service LCD unit Speaker assembly Keyboard bezel assembly LED and power button board Fingerprint reader bracket Fingerprint reader Thermal fan assembly Memory module Hard disk drive or solid-state drive Hard disk drive bracket SIM card tray Base cover assembly Hardware Maintenance Manual...
  • Page 53 Table 9. Major FRUs (continued) FRU descriptions Self-service Optional service Battery pack Hard disk drive or solid-state drive sub card Backup battery M.2 wireless WAN card M.2 wireless LAN card Media card reader slot System board VGA connector VGA connector bracket Clickpad Smart card bezel DC-in cable...

  • Page 54: Lcd Frus

    LCD FRUs Table 10. LCD FRUs No. FRU descriptions Self-service Optional service LCD bezel assembly Hinge kit Integrated camera and microphone combo card Antenna kit LCD rear cover assembly LED cable assembly LCD cable assembly LCD panel Miscellaneous parts and other FRUs Table 11.

  • Page 55: Looking Up Fru Information

    Table 12. Other FRUs FRU descriptions Self-service Optional service ac adapter Power cord Dock adaptor PCH bracket Looking up FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: http://www.lenovo.com/serviceparts-lookup Chapter 7 Locations...
  • Page 56 Hardware Maintenance Manual...

  • Page 57: Chapter 8. Fru Replacement Notices

    Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at http://www.lenovo.com/support.

  • Page 58: Retaining Serial Numbers

    If you replace the system board, you must restore the serial number of the system unit to its original value. Before replacing the system board, save the original serial number by doing the following: 1. Install the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and then restart the computer.

  • Page 59: Retaining The Uuid

    When you replace the system board, follow the following steps to create new UUID for the system board if the system board does not have a UUID: 1. Install the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and then restart the computer.
  • Page 60 If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system. If the system board is inoperable, this will not be possible. Hardware Maintenance Manual...

  • Page 61: Chapter 9. Removing Or Replacing A Fru

    Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual is available for downloading at http://www.lenovo.com/support.

  • Page 62: Before Servicing The Computer

    Before servicing the computer Carefully read this topic before servicing the computer. Disabling the built-in battery Before replacing any FRU, ensure that you have disabled the built-in battery by doing the following: 1. Turn off your computer and disconnect the ac power adapter and all cables from the computer. 2.

  • Page 63: 1010 Base Cover

    1010 Base cover Removal steps of the base cover Note: Loosen the screws Applying labels to the base cover: The new base cover FRU is shipped with a kit containing labels of several kinds. Apply those labels when you replace the base cover. For the labels that are not shipped with the new base cover, peel them from the old base cover, and adhere them to the new one.

  • Page 64: 1020 Hard Disk Drive Or Solid-State Drive

    The following labels need to be peeled off from the old base cover, and then adhered to the new base cover. Non-encryption label China 3G WWAN label Asset tag Model label Asset tag Taiwan WWAN label Israel label GML label Brazil WWAN label Wireless label for special bid Indonesia rating label...

  • Page 65: 1030 M.2 Wireless Lan Card

    When installing: Ensure that the hard disk drive or solid-state drive is firmly attached. 1030 M.2 wireless LAN card For access, remove this FRU: • “1010 Base cover” on page 57 Chapter 9 Removing or replacing a FRU...

  • Page 66: 1040 M.2 Wireless Wan Card

    Removal steps of the M.2 wireless LAN card Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm) When installing: Plug the gray cable into the main connector on the card; and plug the black cable into the auxiliary connector.

  • Page 67: 1050 Memory Module

    Removal steps of the M.2 wireless WAN card Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm) When installing: Plug the red cable into the main connector on the card; and plug the blue cable into the auxiliary connector.

  • Page 68: 1060 Backup Battery

    Removal steps of the memory module When installing: Insert the notched end of the memory module into the memory slot. Press the memory module in firmly, and pivot it downward until it snaps into place. Ensure that the memory module is firmly installed in the slot and does not move easily.

  • Page 69: 1070 Battery Pack

    The only exception to this is if the battery pack is physically damaged or a customer is reporting a possible safety issue. If the Lenovo Solution Center program is not installed on the computer, the customer should download and install the program to diagnose the battery pack, before getting a non-physically damaged battery pack replaced.

  • Page 70: 1080 Keyboard

    Step Screw (quantity) Color Torque 0.181 Nm M2 × 3 mm, small-head, nylon-coated (4) Silver (1.85 kgf-cm) When installing: Ensure that the battery pack connector is attached firmly. 1080 Keyboard Removal steps of keyboard To reveal the screw heads beneath the frame, use the flat end of the multi-tool in the shipping package of the new keyboard to slide the keyboard forward by 2.5mm (0.1 inch).
  • Page 71 Use the cross end of the multi-tool to loosen the screws. Chapter 9 Removing or replacing a FRU...
  • Page 72 Installation steps of keyboard Attach the connectors and then turn over the keyboard. Insert the keyboard into the keyboard bezel as shown. Ensure that the front edge of the keyboard is under the frame of the keyboard bezel. Hardware Maintenance Manual...
  • Page 73 Ensure that the screw heads are exposed completely. Otherwise, reveal the screw heads by sliding the keyboard frame forward with the flat end of the keyboard multi-tool. Tighten the screws with the cross end of the keyboard multi-tool to secure the keyboard in place. Slide the keyboard frame backward by 2.5 mm (0.1 inch) with the flat end of the keyboard multi-tool to hide the latches of the keyboard frame under the keyboard bezel.

  • Page 74: 1090 Thermal Fan Assembly

    Insert the flat end of the keyboard multi-tool into the sides of the space bar to push the keyboard frame backward. Ensure that there is no gap between the keyboard frame and keyboard bezel. 1090 Thermal fan assembly For access, remove this FRU: •...
  • Page 75 When installing: • Before you attach the thermal fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the part marked as in the following illustration. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. •...

  • Page 76: 1100 Hard Disk Drive Or Solid-State Drive Sub Card

    1100 Hard disk drive or solid-state drive sub card For access, remove these FRUs: • “1010 Base cover” on page 57 • “1020 Hard disk drive or solid-state drive” on page 58 Removal steps of the hard disk drive or solid-state drive sub card Step Screw (quantity) Color...
  • Page 77 Removal steps of the speaker assembly Step Screw (quantity) Color Torque M2 × 3 mm, big head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm) M2 × 4.8 + 2 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the connector is attached firmly.

  • Page 78: 1120 System Board And Media Card Reader Slot

    1120 System board and media card reader slot Important notices for handling the system board When handling the system board, read the following: • The system board has an accelerometer, which can be broken when several thousands of G-forces are applied. Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject the accelerometer to as much as 6,000 G's of shock.
  • Page 79 Removal steps of the PCH bracket Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 6 mm, flat-head, nylon-coated (1) (1.85 kgf-cm) The following components soldered on the top side of the system board is extremely sensitive. When you service the system board, avoid any kind of rough handling.
  • Page 80 Removal steps of the system board When installing: Ensure that the connectors are attached firmly. Step Screw (quantity) Color Torque M2 × 3 mm, big head, nylon-coated (2) Silver 0.181 Nm (1.85 kgf-cm) M2 × 2.5 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm)

  • Page 81: 1130 Fingerprint Reader

    Removal steps of the media card reader slot Step Screw (quantity) Color Torque M2 × 3.5 mm, flat-head, nylon-coated (3) Black 0.181 Nm (1.85 kgf-cm) 1130 Fingerprint reader For access, remove these FRUs: • “1010 Base cover” on page 57 •...

  • Page 82: 1140 Dc-In Cable Assembly

    Removal steps of the fingerprint reader Step Screw (quantity) Color Torque M2 × 3 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm) 1140 DC-in cable assembly For access, remove this FRU: • “1010 Base cover” on page 57 Removal steps of the DC-in cable assembly When installing: Ensure that the connector is attached firmly.

  • Page 83: 1150 Led And Power Button Board

    Step Screw (quantity) Color Torque 0.181 Nm M2 × 3 mm, flat-head, nylon-coated (1) Silver (1.85 kgf-cm) 1150 LED and power button board For access, remove these FRUs: • “1010 Base cover” on page 57 • “1090 Thermal fan assembly” on page 68 Removal steps of the LED and power button board When installing: Ensure that the connector is attached firmly.

  • Page 84: 1160 Lcd Unit

    Torque Step Screw (quantity) Color M2 × 3 mm, flat-head, nylon-coated (2) Silver 0.181 Nm (1.85 kgf-cm) 1160 LCD unit For access, remove these FRUs in order: • “1010 Base cover” on page 57 • “1030 M.2 wireless LAN card” on page 59 •...
  • Page 85 Torque Step Screw (quantity) Color M2.5 × 4 mm, flat-head, nylon-coated (4) Black 0.392 Nm (4.0 kgf-cm) Chapter 9 Removing or replacing a FRU...

  • Page 86: 1170 Clickpad

    When installing: Ensure that you route the cables firmly and tape up in the proper positions. Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. 1170 Clickpad For access, remove these FRUs: •...

  • Page 87: 1180 Smart Card Bezel

    1180 Smart card bezel For access, remove these FRUs: • “1010 Base cover” on page 57 • “1070 Battery pack” on page 63 Removal steps of the smart card bezel When installing: Ensure that the connector is attached firmly. Chapter 9 Removing or replacing a FRU...

  • Page 88: 1190 Keyboard Bezel Assembly

    Step Screw (quantity) Color Torque 0.181 Nm M2 × 3 mm, flat-head, nylon-coated (5) Silver (1.85 kgf-cm) When installing: Install the screws in ascending alphabetical order (a to e) as illustrated. 1190 Keyboard bezel assembly For access, remove these FRUs in order: •...

  • Page 89: 2010 Lcd Bezel Assembly

    Removal steps of the keyboard bezel assembly Torque Step Screw (quantity) Color M2.5 × 4 mm, flat-head, nylon-coated (4) Black 0.392 Nm (4.0 kgf-cm) 2010 LCD bezel assembly For access, remove these FRUs in order: • “1010 Base cover” on page 57 Chapter 9 Removing or replacing a FRU...

  • Page 90: 2020 Lcd Panel And Lcd Cable Assembly

    • “1030 M.2 wireless LAN card” on page 59 • “1040 M.2 wireless WAN card” on page 60 • “1160 LCD unit” on page 78 Removal step of the LCD bezel assembly When installing: Ensure that all the latches are attached firmly. 2020 LCD panel and LCD cable assembly For access, remove these FRUs in order: •...

  • Page 91: 2030 Hinge Kit

    Removal steps of the LCD panel and LCD cable assembly Torque Step Screw (quantity) Color M2 × 2 mm, flat-head, nylon-coated (4) Silver 0.181 Nm (1.85 kgf-cm) When installing: Ensure that the LCD connector is attached firmly. 2030 Hinge kit For access, remove these FRUs in order: •...

  • Page 92: 2040 Integrated Camera And Microphone Combo Card And Led Cable Assembly

    Removal steps of the hinge kit Step Screw (quantity) Color Torque 0.181 Nm M2 × 2.5 mm, big-head, nylon-coated (6) Silver (1.85 kgf-cm) 2040 Integrated camera and microphone combo card and LED cable assembly For access, remove these FRUs in order: •...
  • Page 93 Removal steps of the integrated camera and microphone combo card When installing: Ensure that the connector is attached firmly. Chapter 9 Removing or replacing a FRU...

  • Page 94: 2050 Antenna Kit And Lcd Rear Cover Assembly

    Removal step of the LED cable assembly 2050 Antenna kit and LCD rear cover assembly For access, remove these FRUs in order: • “1010 Base cover” on page 57 • “1030 M.2 wireless LAN card” on page 59 • “1040 M.2 wireless WAN card” on page 60 •...
  • Page 95 Cable routing: When you install the antenna kit, route the cables as shown in the following illustration. Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. Antenna locations Wireless LAN main antenna (gray) Wireless WAN main antenna (red)
  • Page 96 Wireless LAN auxiliary antenna (black) Hardware Maintenance Manual...

  • Page 97: 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 98: Electronic Emissions Notices

    For electronic emission information on Class B digital devices, refer to the corresponding information in the User Guide. EU contact: Lenovo, Einsteinova 21, 851 01 Bratislava, Slovakia Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Lenovo ThinkPad TrackPoint Ultrabay Microsoft, Windows, and Windows Server are trademarks of the Microsoft group of companies.

  • Page 99: Appendix B. Abbreviation Table

    Electrically Erasable Programmable Read-Only Memory Extensible Firmware Interface Electrostatic discharge Field Replaceable Unit General Announce Variant Integrated circuits Liquid Crystal Display Machine type and model Power-on self-test POST RFID Radio-frequency identification Supervisor password UUID Universally unique identifier © Copyright Lenovo 2013...
  • Page 100 Hardware Maintenance Manual...
  • Page 102 Part Number: 0C10894_04 Printed in China (1P) P/N: 0C10894_03 *1P0C10894_03*...

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