Lenovo 12X90005GE Hardware Maintenance Manual
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Lenovo 12X90005GE Hardware Maintenance Manual

Lenovo 12X90005GE Hardware Maintenance Manual

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ThinkCentre M75t Gen 5
Hardware Maintenance Manual

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  • Page 1 ThinkCentre M75t Gen 5 Hardware Maintenance Manual...
  • Page 2 First Edition (August 2024) © Copyright Lenovo 2024. 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

    ....85 problems ....UEFI diagnostic program ... © Copyright Lenovo 2024...
  • Page 4 ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 5: About This Manual

    Important: This manual is intended only for trained service technicians who are familiar with ThinkCentre computers. 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 2024...
  • Page 6 ThinkCentre M75t Gen 5Hardware 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 2024...

  • 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 When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are installed, note the following: • 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. •...
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) ThinkCentre M75t Gen 5Hardware 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 ThinkCentre M75t Gen 5Hardware 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 Einige Lasergeräte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes: 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. ThinkCentre M75t Gen 5Hardware 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 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 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 • Cualquier equipo que se conecte a este producto también debe conectarse a tomas de corriente debidamente cableadas. • 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. •...
  • 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

    • Do not drop a system board or apply any excessive force to it. • Avoid rough handling of any kind. • Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset. © Copyright Lenovo 2024...

  • 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* SD-card slot* Power button Storage drive activity indicator ® ThinkCentre Microphone connector Headset connector ® USB-C connector (USB 5Gbps) USB-A connectors (USB 5Gbps) Internal speaker* * for selected models © Copyright Lenovo 2024...

  • Page 36: Rear

    Rear Description Description Item Item ™ DisplayPort out connectors Audio line-out connector ™ USB-A connectors (Hi-Speed USB) HDMI out connector USB-A connector (Hi-Speed USB) (with smart Power cord connector power-on feature) Smart cable clip slots Ethernet connector E-lock slots Serial connector* PCI-Express card area Padlock loop Security-lock slot...

  • 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 2024...

  • 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 ThinkCentre M75t Gen 5Hardware 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 2024...
  • 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

    Tool name Specification Product scope Tool type Mylar tape Consumable Eraser Consumable Electrical tape Consumable Double sided tape Consumable Conductive tape Consumable Cleaning pads/wipes Consumable Heat gun Special Tool (Depot only) Brown brush 25 mm to 35 mm wide Special tool Contact Cleaner Spray WD-40 Contact Cleaner for ThinkPad X1 Carbon...
  • Page 52 ThinkCentre M75t Gen 5Hardware Maintenance Manual...
  • Page 53 Number Description Self-service CRU Optional-service CRU Heat sink and fan assembly Memory modules Microprocessor System board Wi-Fi card* Wi-Fi card cover* M.2 solid-state drive* M.2 solid-state drive bracket* Heat sink for M.2 solid-state drive* ThinkCentre LED cable ThinkCentre LED clip Card reader* Card reader bracket* Chassis...
  • Page 54 COM2 cable Dummy optical drive shielding* AVC,C2 bracket AVC,PCI-Express cable lock bracket* * for selected models For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go http://www.lenovo.com/serviceparts-lookup ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 55: System Board Illustration

    System board illustration Description Description Item Item 8-pin power connector Microprocessor socket Microprocessor fan connector Memory slot (DIMM1) Memory slot (DIMM2) Auxiliary fan connector 2 Internal speaker connector Power button board connector 10-pin power connector SATA power connectors (2) Auxiliary fan connector 1 ThinkCentre LED connector SATA 3.0 connectors (3) Buzzer...

  • Page 56: Removing And Installing Hardware

    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” on page 1. External options You can connect external options to your computer, such as external speakers, a printer, or a scanner.

  • Page 57: Optical Drive

    Note: If a locking device is available, use it to lock the computer after installing the computer cover. Screw (quantity) Color Torque Thumb screw, Nickel Silver 5 ± 05 lb/in coated (2) Optical drive Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.
  • Page 58 ThinkCentre M75t Gen 5Hardware Maintenance Manual...
  • Page 59 Chapter 6 Hardware removal and installation...

  • Page 60: Front Bezel

    Front bezel Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: • “Computer cover” on page 50 • “Optical drive” on page 51 Removal steps ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 61: Drive Bay Assembly

    Drive bay assembly 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 50 • “Optical drive” on page 51 • “Front bezel” on page 54 Removal steps Chapter 6 Hardware removal and installation...

  • Page 62: Pci-Express Card Holder

    PCI-Express card holder 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 50 • “Optical drive” on page 51 • “Front bezel” on page 54 •...

  • Page 63: 3.5-Inch Hard Disk Drive

    3.5-inch hard disk drive 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 64: Memory Module

    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 the following parts in order: •...

  • Page 65: M.2 Solid-State Drive And Heat Sink

    Note: During the installation, ensure that you align the memory module with the slot and press down on both ends until the latches are fully engaged with a click. M.2 solid-state drive and heat sink Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. The heat sink might be very hot.
  • Page 66 – Type 1 – Type 2 – Type 3 ThinkCentre M75t Gen 5Hardware Maintenance Manual...
  • Page 67 Note: Remove the film that covers the thermal pad (if any) when installing the M.2 solid-state drive and the heat sink. Screw (quantity) Color Torque M2 x 3 mm (1) Silver 1.5 ± 0.5 lb/in • For M.2 solid-state drive with the M.2 solid-state drive bracket, do one of the following depending on the M.2 solid-state drive model: –...

  • Page 68: M.2 Solid-State Drive Bracket

    Note: Remove the film that covers the thermal pad (if any) when installing the M.2 solid-state drive and the heat sink. M.2 solid-state drive bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 69: Pci-Express Connector Cable

    Removal steps PCI-Express connector cable 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 50 • “Optical drive” on page 51 •...

  • Page 70: Pci-Express Card

    For access, remove these parts in order, if any: • “Computer cover” on page 50 Removal steps PCI-Express card 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 71: Power Supply Assembly

    Notes: • Install only discrete graphics card to the PCI-Express x16 card slot. • Before installing a new PCI-Express card, remove any PCI-Express connector cables that impede the installation. • To finish the installation, ensure that you align the PCI-Express card with the slot and press down on both ends until the latch is fully engaged with a click.

  • Page 72: E-Lock

    Removal steps Screw (quantity) Color Torque 6–32 x 8 mm, Nickel Silver 5 ± 05 lb/in coated (3) E-lock 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. See “Computer cover” on page 50. 2.

  • Page 73: Wi-Fi Card

    Removal steps Torque Screw (quantity) Color M3 x 5–T15–SCREW (1) Silver 5 ± 0.5 lb/in Wi-Fi card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: •...

  • Page 74: Internal Speaker

    Internal speaker Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove these FRUs in order, if any: • “Computer cover” on page 50 • “Optical drive” on page 51 •...

  • Page 75: Power Button Cable And Front Io Bracket

    Removal steps Screw (quantity) Color Torque 6–32 x 8 mm, Nickel Silver 5 ± 0.5 lb/in coated (1) Screw (quantity) Color Torque M3 x 8 mm, Zinc plated (2) Blue 5 ± 0.5 lb/in Power button cable and front IO bracket Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
  • Page 76 • “Drive bay assembly” on page 55 • “Card reader and card reader bracket” on page 68 2. Disconnect the power button cable from the system board. Removal steps Screw (quantity) Color Torque 6–32 x 8 mm, Nickel Silver 5 ± 0.5 lb/in coated (1) ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 77: Thermal Sensor

    Thermal sensor 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 50 • “Optical drive” on page 51 •...

  • Page 78: Thinkcentre Led Cable And Clip

    Removal steps ThinkCentre LED cable and clip Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 79: Front Fan

    For access, do the following: 1. Remove these parts in order, if any: • “Computer cover” on page 50 • “Optical drive” on page 51 • “Front bezel” on page 54 • “Drive bay assembly” on page 55 2. Disconnect the ThinkCentre LED cable from the system board. Removal steps Front fan Prerequisite...

  • Page 80: Rear Fan

    Removal steps Rear fan 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. See “Computer cover” on page 50. ThinkCentre M75t Gen 5Hardware Maintenance Manual...

  • Page 81: Front Wi-Fi Antenna And Cable

    2. Disconnect the rear fan cable from the system board. Removal steps Front Wi-Fi antenna and cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove these FRUs in order, if any: •...

  • Page 82: Rear Wi-Fi Antenna And Cable

    Removal steps Rear Wi-Fi antenna and cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. ThinkCentre M75t Gen 5Hardware Maintenance Manual...
  • Page 83 For access, do the following: 1. Remove these FRUs in order, if any: • “Computer cover” on page 50 • “Optical drive” on page 51 • “Front bezel” on page 54 • “Drive bay assembly” on page 55 2. Disconnect the front Wi-Fi antenna cable from the Wi-Fi card. See “Wi-Fi card” on page 67. Removal steps Chapter 6 Hardware removal and installation...

  • Page 84: Serial Connector Cable

    Serial 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. See “Computer cover” on page 50. 2. Disconnect serial connector cable from the system board. Removal steps Screw (quantity) Color...

  • Page 85: Cover Presence Switch And Avc,C2 Bracket

    Cover presence switch and AVC,C2 bracket 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. See “Computer cover” on page 50. 2. Disconnect the cover presence switch cable from the system board. Removal steps Chapter 6 Hardware removal and installation...

  • Page 86: Heat Sink And Fan Assembly

    Screw (quantity) Color Torque 6–32 x 8 mm, Zinc plated Blue 5 ± 0.5 lb/in Heat sink and fan assembly Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. CAUTION: The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

  • Page 87: Microprocessor

    • Type 2 Screw (quantity) Color Torque 6-32, Nickel coated (4) Silver 5 ± 05 lb/in 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.

  • Page 88: System Board

    Notes: • Touch only the edges of the microprocessor. Do not touch the gold contacts on the bottom. • Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible. Removal steps Note: Before you attach the microprocessor to the computer, clean all thermal grease that has been used and then apply new thermal grease.
  • Page 89 The heat-sink-and-fan assembly 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, do the following: 1. Remove these parts in order, if any: •...
  • Page 90 Removal steps Torque Screw (quantity) Color M3 x 8 mm, Zinc plated (9) Blue 5 ± 0.5 lb/in Note: The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling. When installing: Clean all thermal grease that have been used and then apply new thermal grease if needed.

  • Page 91: 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 92 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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