Lenovo ThinkCentre M90t Gen6 Hardware Maintenance Manual
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Lenovo ThinkCentre M90t Gen6 Hardware Maintenance Manual

Lenovo ThinkCentre M90t Gen6 Hardware Maintenance Manual

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Hardware Maintenance Manual
ThinkCentre M90t Gen6

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  • Page 1 Hardware Maintenance Manual ThinkCentre M90t Gen6...
  • Page 2 First Edition (April 2025) © Copyright Lenovo 2025. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-...

  • Page 3: Table Of Contents

    ... System board ....Self-help resources ... . . © Copyright Lenovo 2025...
  • Page 4 Appendix A. Notices and Rear IO shielding ... . trademarks ....95 Hardware Maintenance Manual...

  • Page 5: About This Manual

    ThinkCentre products, please follow all instructions carefully. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkCentre computer, be sure to read and understand Chapter 1 “Important safety information” on page 1. © Copyright Lenovo 2025...
  • Page 6 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Important Safety Information

    Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool. © Copyright Lenovo 2025...

  • Page 8: Electrical Safety

    Electrical safety CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

  • Page 9: Safety Inspection Guide

    – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) • If an electrical accident occurs: – Use caution; do not become a victim yourself. – Switch off power. –...

  • Page 10: Handling Electrostatic Discharge-Sensitive Devices

    Handling electrostatic discharge-sensitive devices Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.
  • Page 11 • 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. • Connect all power cords to a properly wired and grounded electrical outlet. •...
  • Page 12 • Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device. • Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure.
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) Hardware Maintenance Manual...
  • Page 15 PERIGO A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa. 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. •...
  • Page 16 PRECAUCIÓN: Quando produtos a laser (como unidades de CD-ROMs, unidades de DVD-ROM, dispositivos de fibra ótica ou transmissores) estiverem instalados, observe o seguinte: • Não remova as tampas. A remoção das tampas de um produto a laser pode resultar em exposição prejudicial à...
  • Page 17 Chapter 1 Important safety information...
  • Page 18 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Important safety information...
  • Page 20 DANGER Le courant électrique provenant de l'alimentation, du téléphone et des câbles de transmission peut présenter un danger. Pour éviter tout risque de choc électrique : • Ne manipulez aucun câble et n'effectuez aucune opération d'installation, d'entretien ou de reconfiguration de ce produit au cours d'un orage.
  • Page 21 Connexion Déconnexion 1. Mettez les unités HORS TENSION. 1. Mettez les unités HORS TENSION. 2. Commencez par brancher tous les cordons sur les 2. Débranchez les cordons d'alimentation des prises. unités. 3. Débranchez les câbles d'interface des connecteurs. 3. Branchez les câbles d'interface sur des 4.
  • Page 22 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) ATTENTION: Soulevez la machine avec précaution. ATTENTION: L'interrupteur de contrôle d'alimentation de l'unité et l'interrupteur dubloc d'alimentation ne coupent pas le courant électrique alimentantl'unité. En outre, le système peut être équipé de plusieurs cordonsd'alimentation.
  • Page 23 • Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen. • Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken und Modems ist vor dem Öffnen des Gehäuses zu unterbrechen, sofern in den Installations- und Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind. •...
  • Page 24 Laserstrahlung bei geöffneter Verkleidung. Nicht in den Strahl blicken. Keine Lupen oder Spiegel verwenden. Strahlungsbereich meiden. ≥18 kg ≥32 kg ≥55 kg ACHTUNG: Arbeitsschutzrichtlinien beim Anheben der Maschine beachten. ACHTUNG: Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit nicht unterbrochen.
  • Page 25 Chapter 1 Important safety information...
  • Page 26 PERICOLO La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere pericolosa. Hardware Maintenance Manual...
  • Page 27 Per evitare il rischio di scosse elettriche: • Non collegare o scollegare qualsiasi cavo oppure effettuare l'installazione, la manutenzione o la riconfigurazione del prodotto durante un temporale. • Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a terra.
  • Page 28 • 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. • L'utilizzo di controlli, regolazioni o l'esecuzione di procedure non descritti nel presente manuale possono provocare l'esposizione a radiazioni pericolose.
  • Page 29 Chapter 1 Important safety information...
  • Page 30 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 31 • Siempre que sea posible, utilice una sola mano para conectar o desconectar los cables de señal. • No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales. • Desconecte los cables de alimentación, los sistemas de telecomunicaciones, las redes y los módems conectados antes de abrir las cubiertas de los dispositivos, a menos que se indique lo contrario en los procedimientos de instalación y configuración.
  • Page 32 PELIGRO 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 33: Chapter 2. Important Service Information

    After replacing the system board, the recommended option is to download the latest UEFI BIOS package from Lenovo Support Web site to bind the model type, serial number, and brand ID of the computer with the new system board. Or use Golden Key U1 tool to bind the new system board. Refer to https:// support.lenovo.com/solutions/ht102004...

  • Page 34: How To Use Error Codes

    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 35: Chapter 3. Product Overview

    Optical drive eject button* Optical drive activity indicator* Power button Power indicator Storage drive activity indicator SD-card slot* ® USB-C connector (USB 20Gbps) Headset connector USB-A connector (USB 5Gbps) USB-A connector (USB 10Gbps) Internal speaker * for selected models © Copyright Lenovo 2025...

  • Page 36: Rear

    Rear Description Description Item Item Optional connector* Audio line-out connector ™ ™ DisplayPort out connectors HDMI out connector USB-A connector (Hi-Speed USB) USB-A connector (USB 5Gbps) USB-A connector (USB 5Gbps, Always On Padlock loop USB) PS/2 keyboard connector* PS/2 mouse connector* Ethernet connector E-lock slots Smart cable clip slots...

  • Page 37: Chapter 4. Service Checkout And Symptom-To-Fru Index

    • 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? – Has this configuration ever worked? © Copyright Lenovo 2025...

  • Page 38: Symptom-To-Fru Index

    – If it has been working, what changes were made prior to its failing? – Is this the original reported failure? • Diagnostics version – Type and version level • Hardware configuration – Print (print screen) configuration currently in use –...

  • Page 39: Power Supply Problems

    Error FRU/Action The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following: 1. Attempt to back up the data on the failing hard disk drive. 2. Using the operating system programs, format the hard disk drive.

  • Page 40: Post Error Codes

    POST error codes Each time you turn on the system, it performs a series of tests that check the operation of the system and some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following operations: •...

  • Page 41: Miscellaneous Error Conditions

    POST error message Description/Action Error code 8998 Not enough shadow RAM resources This error message is displayed for OPTION ROM, not all devices when the shadow RAM resources initialized. Suggest to remove some for option ROM are insufficient. add-on cards, or change to UEFI If the legacy option ROM is mode in BIOS setup.
  • Page 42 Message/Symptom FRU/Action Blank screen except for flashing cursor. 1. System Board 2. Primary Hard Disk Drive 3. Hard Disk Drive Cable Incorrect memory size during POST 1. Run the Memory tests. 2. Memory Module 3. System Board "Insert a Diskette" icon appears with a known-good 1.

  • Page 43: Undetermined Problems

    Message/Symptom FRU/Action Serial or parallel connector device failure (system board 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4. System Board Serial or parallel connector device failure (adapter 1. External Device Self-Test OK? connector) 2. External Device 3.

  • Page 44: Clear Cmos

    Note: Depending on the computer model, the recovery process will take two to three minutes. 8. Disconnect all power cords from electrical outlets. 9. Move the jumper back to the standard position. 10. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and the monitor to electrical outlets.

  • Page 45: Chapter 5. Diagnostics

    4. Run the diagnostic program. 5. Recover your operating system. See “Self-help resources” on page 40. 6. If the problem persists, contact Lenovo. UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

  • Page 46: Lenovo Diagnostic Tools

    Note: The options on the main screen might vary, depending on the hardware configuration and the UEFI diagnostic program version preinstalled on the computer. Lenovo diagnostic tools For information about Lenovo diagnostic tools, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions Self-help resources Use the following self-help resources to learn more about the computer and troubleshoot problems.
  • Page 47 • Setup Guide want. • This User Guide • Regulatory Notice Lenovo Support Web site with the latest support information of the following: • Drivers and software • Diagnostic solutions https://pcsupport.lenovo.com • Product and service warranty •...
  • Page 48 Hardware Maintenance Manual...

  • Page 49: Chapter 6. Hardware Removal And Installation

    Common tool Screwdriver: Phillips Head 01 1, Shank length greater than 6 ThinkStation/DT Common tool inches Screwdriver: Phillips Head 02 2, Shank length greater than 6 ThinkStation/SC/DT Common tool inches Screwdriver: Torx Head T5 IdeaPad Common tool © Copyright Lenovo 2025...
  • Page 50 Tool name Specification Product scope Tool type Screwdriver: Torx Head T15 T15, for Chassis outside ThinkStation Common tool Screwdriver: Torx Head T20 T20, Shank length greater than ThinkStation Common tool 6 inches, for heatsink and CPU Screwdriver: Torx Head T30 T30, Shank length greater than ThinkStation Common tool...

  • Page 51: Major Frus And Crus

    • FRUs: Refer to parts that are more complicated to replace and it is recommended that these should be replaced by trained service technicians. If customers elect to replace the FRUs by themselves, we recommend that you ensure the correct instructions provided by Lenovo are carefully followed. Chapter 6...
  • Page 52 Number Description Self-service CRU Optional-service CRU Side cover Thumb screws CPU heat sink and fan assembly Hardware Maintenance Manual...
  • Page 53 Number Description Self-service CRU Optional-service CRU NPU card* M.2 solid-state drives* M.2 solid-state drive bracket* Smart cable clip* Heat sinks and thermal pads for M.2 solid-state drive* Rear fan* Cover presence switch cable* Cover presence switch bracket* Front and rear Wi-Fi antennas Rear Wi-Fi antenna cover* Rear I/O shielding Optical drive cable*...
  • Page 54 Chassis rubber foot Smart cable* PS2 cable* HDMI cover kit* DP cover kit* Dust shield* * for selected models For detailed FRU and CRU information, such as t he FRU part numbers and supported computer models, go http://www.lenovo.com/serviceparts-lookup Hardware Maintenance Manual...

  • Page 55: System Board Illustration

    System board illustration PS/2 keyboard and mouse connector 8-pin power connector Microprocessor socket Microprocessor fan connector Memory slot (DIMM1) Memory slot (DIMM2) Memory slot (DIMM3) Memory slot (DIMM4) Auxiliary fan connector 2 Power button connector Internal speaker connector Clear CMOS (Complementary Metal Oxide Semiconductor)/Recovery jumper 10-pin power connector SATA power connectors...

  • Page 56: Removing And Installing Hardware

    Gen5 M.2 solid-state drive slot System fan connector Cover presence switch connector (intrusion switch Optional connector connector)O Clear CMOS position Description Description Item Item Standard position Clear CMOS position Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer. Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Important safety information”...

  • Page 57: Dust Shield

    Dust shield Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Removal steps Pull the dust shield out of the front bezel from the bottom side. Installation steps Install the new dust shield in reverse order.

  • Page 58: Computer Cover

    Computer cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. For access, do the following: 1.

  • Page 59: Front Bezel

    Note: If a locking device is available, use it to lock the computer after installing the computer cover. Front bezel Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these parts in order, if any: •...

  • Page 60: Optical Drive And Optical Drive Latch

    Installation steps 1. Align the three hooks on the bottom of the front bezel with the slots on the chassis. 2. Pivot the bezel inwards until the tabs on the top of the bezel are clicked into place. Optical drive and optical drive latch Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
  • Page 61 1. Remove the “Computer cover” on page 52. 2. Disconnect the signal and power cable from the optical drive. Removal steps 1. Press the optical drive latch and push the optical drive out of the disk drive cage. 2. Pull the optical drive latch out of the optical drive. Installation steps 1.

  • Page 62: Optical Drive Bezel

    Optical drive bezel Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove the “Computer cover” on page 52. 2. Remove the “Optical drive and optical drive latch” on page 54. 3.
  • Page 63 Installation steps There are four holes on the optical drive tray to locate the optical drive bezel. 1. Install the optical drive bezel to the optical drive tray, and make sure that it is inserted into these holes. 2. Install the optical drive tray back to the optical drive. Chapter 6 Hardware removal and installation...

  • Page 64: Slim Odd Emi Shielding

    Slim ODD EMI shielding Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove the “Computer cover” on page 52. 2. Remove the “Front bezel” on page 53 Removal steps Push the slim ODD EMI shielding outwards to remove it.

  • Page 65: Primary Hard Disk Drive Cage

    Removal steps 1. Pull the hard disk drive and its drive tray from the primary storage drive cage. 2. Release the hard disk drive from its tray. Primary hard disk drive cage Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Attention: The internal storage drive is sensitive.

  • Page 66: Odd And Hdd Cage

    • Do not apply pressure to the internal storage drive. • Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks. For access, remove these parts in order, if any: •...
  • Page 67 2. Disconnect the signal cable and power cable (if any) from the secondary hard disk drive under the optical drive cage. Removal steps Press the ODD and HDD cage tab and lift the cage upwards. Installation steps 1. Align the buckles on the ODD and HDD cage with the slots on the chassis. 2.

  • Page 68: 2.5-Inch Hard Disk Drive Bracket

    2.5-inch hard disk drive bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines: •...

  • Page 69: Optical Drive And Optical Drive Latch

    Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines: • Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement.

  • Page 70: M.2 Solid-State Drive And Heat Sink

    M.2 solid-state drive and heat sink Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Attention: The internal storage drive is sensitive.
  • Page 71 Removal steps for Type-2 M.2 solid-state drive The type-2 M.2 solid-state drive is installed in its heat sink. To remove Type-2 M.2 solid-state drive, take following steps: 1. Release the heat sink from the system board by pulling the SSD clip out of its holder. 2.

  • Page 72: M.2 Solid-State Drive Bracket

    Removal steps for Type-3 M.2 solid-state drive The type-3 M.2 solid-state drive is installed in its heat sink. To remove Type-3 M.2 solid-state drive, take following steps: 1. Release the heat sink from the system board by pulling the SSD clip out of its holder. 2.

  • Page 73: Pcie Card

    PCIe card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the “Computer cover” on page 52. Removal steps 1. Open the PCIe latch. 2. Press the securing tab and lift the PCIe card out of the slot. Note: Do not attempt to install any PCI-Express cards other than graphics card to the PCI-Express slot next to the microprocessor.

  • Page 74: Graphics Card

    Graphics card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove these parts in order, if any: • “Computer cover” on page 52 • “Optical drive and optical drive latch” on page 54 •...

  • Page 75: Memory Module

    Note: Do not attempt to install any PCIe cards other than graphics card to the PCI-Express slot next to the microprocessor. Memory module Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Ensure that you follow the installation order for memory modules shown in the following illustration. For access, remove these parts in order, if any: Chapter 6 Hardware removal and installation...

  • Page 76: Power Supply Assembly

    • “Computer cover” on page 52 • “Optical drive and optical drive latch” on page 54 • “ODD and HDD cage” on page 60 • “Graphics card holder” on page 67 Removal steps 1. Open the two retaining tabs. 2. Lift the memory module out of the slot. Installation steps Align the memory module to the slot and press down on both ends until the latches are fully engaged with a click.

  • Page 77: E-Lock

    Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician. For access, do the following: 1.

  • Page 78: Chassis Beam

    1. Remove the “Computer cover” on page 52. 2. Disconnect the E-lock cable from the system board. Removal steps 1. Use a special tool (T15 star wrench) to remove the screw which secures the E-lock to the chassis. Find screw specification like torque in the following screw table. Quantity Torque Screw...
  • Page 79 Installation steps 1. Align the hooks of the chassis beam on the one side with the holes on the rear panel of chassis. 2. Pivot the chassis beam until the hooks of the other side are clicked into the front panel of the chassis . Chapter 6 Hardware removal and installation...

  • Page 80: Pcie Connector Cable

    PCIe connector cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove the “Computer cover” on page 52. 2. Disconnect the PCI-Express connector cable from the system board. Removal steps Open the latch and remove the PCIe connector cable.

  • Page 81: Internal Speaker

    Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines: •...

  • Page 82: Heat Sink And Fan Assembly

    • “Front bezel” on page 53 • “ODD and HDD cage” on page 60 2. Disconnect the internal speaker cable from the system board. Removal steps 1. Remove the screw which secures the speaker to the chassis. Find screw specification in the following screw table.
  • Page 83 2. Disconnect the microprocessor fan cable from the system board. Removal steps 1. Follow the following sequence to loosen the four screws that secure the heat sink and fan assembly to the system board. a. Partially loosen screw , fully loosen screw , and then fully loosen screw b.

  • Page 84: Front Io Bracket

    Note: Ensure that the heat sink and fan assembly cable is toward the microprocessor fan connector on the system board. Front IO bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 85: Power Button

    Power button Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, Remove these parts in order, if any: • “Computer cover” on page 52 • “Front bezel” on page 53 • “Front IO bracket” on page 78 Removal steps Press the bottom tab of the power button and push it towards the front IO bracket.

  • Page 86: Card Reader

    Card reader Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, Remove these parts in order, if any: • “Computer cover” on page 52 • “Front bezel” on page 53 • “Front IO bracket” on page 78 Removal steps 1.

  • Page 87: Front Wi-Fi Antenna

    Note: During installation, ensure that you connect the gray cable to the connector labeled AUX on the card, and the black cable to the connector labeled MAIN. Front Wi-Fi antenna Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these parts in order, if any: •...

  • Page 88: Rear Wi-Fi Antenna Cover

    Rear Wi-Fi antenna cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove “Computer cover” on page 52. Removal steps Press the tab on the rear Wi-Fi antenna cover and pull it out of the chassis. Installation steps 1.

  • Page 89: Front Fan

    • “Computer cover” on page 52 • “Rear Wi-Fi antenna cover” on page 82 Removal steps 1. Pull the rear Wi-Fi antenna from the hole on the rear panel. 2. Pull to remove the rear Wi-Fi antenna module away from the chassis. Front fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 90: Rear Fan

    Installation steps 1. Align the rubber grommets of the front fan with the holes on the chassis. 2. Twirl and pull the rubber grommets until the front fan snaps into position. Rear fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 91: Flexible I/O Board

    Removal steps 1. Pull the rubber grommets to release the rear fan from the chassis. 2. Remove the rear fan off the chassis. Installation steps 1. Align the rubber grommets of the rear fan with the holes on the chassis. 2.

  • Page 92: Thermal Sensor

    For access, remove these parts in order, if any: • “Computer cover” on page 52 • “E-lock” on page 71 • “Rear fan” on page 84 Removal steps 1. Remove the screw which secures the flexible I/O board to the chassis and the three screws on the flexible I/O board.

  • Page 93: Cover Presence Switch Cable And Bracket

    2. Disconnect the thermal sensor cable from the system board. Removal steps Pinch the tab on the bottom edge of the thermal sensor and push the thermal senor towards the chassis. Cover presence switch cable and bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 94: Microprocessor

    Microprocessor Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. For access, remove these parts in order, if any: •...
  • Page 95 2. Lift the level upward and open the microprocessor cover. 3. Gently lift the microprocessor from the socket. Installation steps Notes: • Before you attach the CPU to the computer, clean all thermal grease that has been used and then apply new thermal grease.

  • Page 96: System Board

    System board Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Notes: •...
  • Page 97 • “Rear fan” on page 84 • “Flexible I/O board” on page 85 • “Cover presence switch cable and bracket” on page 87 • “Power supply assembly” on page 70 • “Microprocessor” on page 88 2. Record the cable routing and cable connections, and then disconnect all cables from the system board. See “System board illustration”...
  • Page 98 3. Carefully check the four corners of the socket cover to ensure that the cover is seated securely. 4. Follow any additional instructions that are included with the replacement part you received. Rear IO shielding Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these parts in order, if any: •...
  • Page 99 Removal steps Press the protrusion on the edge of rear I/O shielding and slide to remove the rear I/O shielding shield towards the top panel. Chapter 6 Hardware removal and installation...
  • Page 100 Hardware Maintenance Manual...

  • Page 101: Appendix A. Notices And Trademarks

    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 102 Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment. This document is copyrighted by Lenovo and is not covered by any open source license, including any ® Linux agreement(s) which may accompany software included with this product.

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