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Lenovo ThinkCentre M90t Gen 3 Hardware Maintenance Manual
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Lenovo ThinkCentre M90t Gen 3 Hardware Maintenance Manual

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M90t Gen 3
Hardware Maintenance Manual

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Summary of Contents for Lenovo ThinkCentre M90t Gen 3

  • Page 1 M90t Gen 3 Hardware Maintenance Manual...
  • Page 2 First Edition (March 2022) © Copyright Lenovo 2022. 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

    ....95 The Vantage app ....Self-help resources ... . . © Copyright Lenovo 2022...
  • Page 4 M90t Gen 3 Hardware 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 2022...
  • Page 6 M90t Gen 3 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 2022...

  • 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

    • Do not service the following parts with the power on when they are removed from their normal operating places in a machine: – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) •...

  • Page 10: Handling Electrostatic Discharge-Sensitive Devices

    8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with. 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 • 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 12 CAUTION: 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) M90t Gen 3 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 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 M90t Gen 3 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 • 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. • Zum Installieren, Transportieren und Öffnen der Abdeckungen des Computers oder der angeschlossenen Einheiten die Kabel gemäß...
  • 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. Per evitare il rischio di scosse elettriche: M90t Gen 3 Hardware Maintenance Manual...
  • Page 27 • 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. • Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per questo prodotto.
  • 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 • 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 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 2022...

  • 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

    5. Power indicator ® 8. Microphone connector 7. ThinkCentre ® 10. USB-C (3.2 Gen 2) connector 9. Headset connector 11. USB 3.2 connectors Gen 1 12. USB 3.2 connectors Gen 2 13. Internal speaker * for selected models © Copyright Lenovo 2022...

  • Page 36: Rear

    Rear 2. Optional connector* 1. Audio line-out connector ™ 4. DisplayPort out connectors ™ 3. HDMI out connector 6. USB 3.2 connector Gen 1 (with smart power-on 5. USB 3.2 connectors Gen 1 feature) 7. Padlock loop 8. PS/2 mouse connector* 9.

  • 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 2022...

  • 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 Message/Symptom FRU/Action Computer will not RPL from server 1. Ensure that the network is in startup sequence as the first device or the first device after diskette. 2. Ensure that the network adapter is enabled for RPL. 3. Network adapter (Advise network administrator of new MAC address) ®...

  • Page 42: Undetermined Problems

    Message/Symptom FRU/Action Power-on indicator or hard disk drive in-use light not on, 1. Power switch/LED assembly but computer works correctly 2. System Board Printer problems 1. Printer 2. System Board Program loads from the hard disk with a known-good 1. Run the Setup Utility program and check the Startup diagnostics diskette in the first 3.5-inch diskette drive sequence.
  • Page 43 e. External Cache f. External Cache RAM g. Hard disk drive h. Diskette drive 3. Turn on the computer to retest the system. 4. Repeat steps 1 through 3 until you find the failing device or adapter. If all devices and adapters have been removed, and the problem continues, replace the system board. See Chapter 6 “Hardware removal and installation”...
  • Page 44 M90t Gen 3 Hardware Maintenance Manual...

  • 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

    If you are unable to isolate and resolve the problem after running the Vantage app, save and print the log files created by the program. You might need the log files when you speak to a Lenovo technical support representative.
  • 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 M90t Gen 3 Hardware Maintenance Manual...

  • Page 49: Chapter 6. Hardware Removal And Installation

    Common tool Isolated tweezers Common tool Hexagonal socket Common tool Silicone grease Consumable tool Polyamide tape Consumable tool Mylar tape Consumable tool Eraser Consumable tool Electrical tape Consumable tool Double-sided tape Consumable tool Conductive tape Consumable tool © Copyright Lenovo 2022...

  • Page 50: Major Frus And Crus

    Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps. The hexagonal socket is used to pick up the antenna connectors. Major FRUs and CRUs Your computer contains the following types of CRUs and FRUs: •...
  • Page 51 Number Description Self-service CRU Optional-service CRU Computer cover Thumb screws 65-watt heat sink and fan assembly* 125-watt heat sink and fan assembly* Chapter 6 Hardware removal and installation...
  • Page 52 Number Description Self-service CRU Optional-service CRU M.2 solid-state drives* M.2 solid-state drive bracket* Thermal pads* Coin-cell battery Smart cable clip* Heat sinks for M.2 solid-state drive* Rear fan* Cover presence switch cable* Cover presence switch bracket* Front and rear Wi-Fi antennas, and the cover for rear Wi-Fi antenna* Rear I/O shield Optical drive cable*...
  • Page 53 Wi-Fi card shield* Wi-Fi card* VRM heat sink Graphics cards* Flexible I/O board* * 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 Chapter 6 Hardware removal and installation...

  • Page 54: System Board

    System board 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) Power button connector Internal speaker connector Auxiliary fan connector 1 ThinkCentre LED connector 10-pin power connector SATA power connectors Clear CMOS (Complementary Metal Oxide...

  • Page 55: Removing And Installing Hardware

    System fan connector Cover presence switch connector (intrusion switch connector) Coin-cell battery Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer. You can expand the capabilities of your computer and maintain your computer by removing or installing hardware. Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Important safety information”...

  • Page 56: Optical Drive

    Optical drive 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 49. 2. Disconnect the signal and power cable from the optical drive. Removal steps M90t Gen 3 Hardware Maintenance Manual...

  • Page 57: Front Bezel

    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: • “Computer cover” on page 49 • “Optical drive” on page 50 Chapter 6 Hardware removal and installation...

  • Page 58: Primary Hard Disk Drives

    Replacement procedure Primary hard disk drives 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 59 • Before replacing the internal storage drive, make a backup copy of all the data that you want to keep. • Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged. •...
  • Page 60 M90t Gen 3 Hardware Maintenance Manual...

  • Page 61: Optical Drive Cage

    Optical drive cage 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 49 • “Optical drive” on page 50 •...

  • Page 62: Secondary Hard Disk Drives

    Secondary hard disk drives 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 63 Removal steps of the 2.5-inch secondary storage drive, bracket, and cage Chapter 6 Hardware removal and installation...

  • Page 64: M.2 Solid-State Drive And Heat Sink

    Removal steps of the 3.5-inch secondary storage drive, plastic bracket, and cage 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.
  • Page 65 • 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 the “Computer cover” on page 49. Removal steps Remove the M.2 solid-state drive and the heat sink (if any) depending on the computer model.

  • Page 66: M.2 Solid-State Drive Bracket

    – Type 2 – Type 3 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 these parts in order, if any: M90t Gen 3 Hardware Maintenance Manual...

  • Page 67: Pci-Express Connector Cable

    • “Computer cover” on page 49 • “M.2 solid-state drive and heat sink” on page 58 Replacement procedure 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.

  • Page 68: Graphics Card Fan

    Removal steps Notes: • Do not attempt to install any PCI-Express cards other than graphics card to the PCI-Express slot next to the microprocessor. • Before installing a new PCI-Express card, remove any PCI-Express connector cables that impede the installation. See “PCI-Express connector cable” on page 61. Graphics card fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 69: Graphics Card Holder

    Graphics card holder Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the “Computer cover” on page 49. Replacement procedure Chapter 6 Hardware removal and installation...

  • Page 70: Graphics Card

    Graphics card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Replacement procedure of the graphics card secured with a plastic holder and a bracket For access, do the following: 1. Remove these parts in order, if any: •...
  • Page 71 Chapter 6 Hardware removal and installation...
  • Page 72 Replacement procedure of the graphics card secured with a plastic holder For access, do the following: 1. Remove these parts in order, if any: • “Computer cover” on page 49 • “Graphics card holder” on page 63 2. Disconnect the power cable (if any) from the graphics card. M90t Gen 3 Hardware Maintenance Manual...

  • Page 73: Memory Module

    Note: Do not attempt to install any PCI-Express 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: •...

  • Page 74: 3.5-Inch Primary Hard Disk Drive Cage

    • “Front bezel” on page 51 • “Optical drive cage” on page 55 Replacement procedure Note: During the installation, ensure that you align the memory module to the slot and press down on both ends until the latches are fully engaged with a click. 3.5-inch primary hard disk drive cage Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 75: Power Supply Assembly

    • “Primary hard disk drives” on page 52 Removal steps Power supply assembly Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Although there are no moving parts in the computer after the power cord has been disconnected, the following warnings are required for your safety.

  • Page 76: Coin-Cell Battery

    • “3.5-inch primary hard disk drive cage” on page 68 2. Disconnect the power supply assembly cables from the system board. Removal steps Coin-cell battery Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel connector assignments (configurations).

  • Page 77: E-Lock

    Removal steps Note: After installing a new coin-cell battery, reset the system date and time in the UEFI BIOS menu. E-lock Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 78: Heat Sink And Fan Assembly

    Heat sink and fan assembly Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. 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. For access, do the following: 1.
  • Page 79 2. Position the heat sink and fan assembly on the system board. Ensure that the four screws are aligned with the holes in the system board. Follow the following sequence to tighten the four screws to secure the new heat sink and fan assembly. Do not over-tighten the screws. •...
  • Page 80 Replacement procedure of 125-watt heat sink and fan assembly 1. Remove the four screws that secure the heat sink and fan assembly to the chassis. Then, follow the following sequence to loosen the four screws that secure the heat sink and fan assembly to the system board.
  • Page 81 2. Position the new heat sink and fan assembly on the system board. Ensure that the four screws are aligned with the holes in the system board. Follow the following sequence to tighten the four screws to secure the new heat sink and fan assembly to the system board. Do not over-tighten the screws. Then, install the four screws to secure the new heat sink and fan assembly to the chassis.

  • Page 82: Chassis Beam

    Chassis beam Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these FRUs in order if any: • “Computer cover” on page 49 • “Optical drive” on page 50 • “Front bezel” on page 51 •...
  • Page 83 Replacement procedure Chapter 6 Hardware removal and installation...

  • Page 84: Front I/O Bracket, Power Button Cable, And Card Reader

    Front I/O bracket, power button cable, and card reader 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 49 •...
  • Page 85 Removal steps Chapter 6 Hardware removal and installation...

  • Page 86: 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 parts in order, if any: • “Computer cover” on page 49 • “Optical drive” on page 50 •...

  • Page 87: Front Wi-Fi Antenna

    Removal steps 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

    Rear Wi-Fi antenna Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove “Computer cover” on page 49. Replacement procedure M90t Gen 3 Hardware Maintenance Manual...

  • Page 89: Front Fan

    Front fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: Chapter 6 Hardware removal and installation...

  • Page 90: Rear Fan

    1. Remove these parts in order, if any: • “Computer cover” on page 49 • “Optical drive” on page 50 • “Front bezel” on page 51 2. Disconnect the front fan cable from the system board. Removal steps Rear fan Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 91: Flexible I/O Board

    For access, do the following: 1. Remove “Computer cover” on page 49. 2. Disconnect the rear fan cable from the system board. Replacement procedure Flexible I/O board Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these parts in order, if any: Chapter 6 Hardware removal and installation...

  • Page 92: Thinkcentre Led

    • “Computer cover” on page 49 • “E-lock” on page 71 • “Rear fan” on page 84 Removal steps ThinkCentre LED Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 93: Thermal Sensor

    Removal steps 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 49 • “Optical drive” on page 50 •...

  • Page 94: Cover Presence Switch Bracket And Cable

    Removal steps Cover presence switch bracket and cable Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1. Remove “Computer cover” on page 49. 2. Disconnect the cover presence switch cable from the system board. M90t Gen 3 Hardware Maintenance Manual...

  • Page 95: Microprocessor

    Removal steps 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 96: System Board

    Removal steps 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 • “M.2 solid-state drive and heat sink” on page 58 • “Optical drive cage” on page 55 • “Secondary hard disk drives” on page 56 • “PCI-Express connector cable” on page 61 • “PCI-Express card” on page 61 • “Graphics card fan” on page 62 •...

  • Page 98: Vrm Heat Sink

    • Ensure that a new VRM heat sink is installed when you install the system board. If the new system board does not come with a VRM heat sink, see “VRM heat sink” on page 92 to install one first. •...
  • Page 99 • “Graphics card holder” on page 63 • “Graphics card” on page 64 • “Heat sink and fan assembly” on page 72 • “Chassis beam” on page 76 • “Memory module” on page 67 • “Coin-cell battery” on page 70 •...
  • Page 100 M90t Gen 3 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 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. Lenovo may update this document at any time without notice.

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