Lenovo ThinkCentre M90s Gen 2 Hardware Maintenance Manual
  1. Manuals
  2. Brands
  3. Lenovo Manuals
  4. Desktop
  5. ThinkCentre M90s Gen 2
  6. Hardware maintenance manual

Lenovo ThinkCentre M90s Gen 2 Hardware Maintenance Manual

Hide thumbs Also See for ThinkCentre M90s Gen 2:
Table of Contents

Advertisement

Quick Links

Download this manual
M70s Gen 2 and M90s Gen 2
Hardware Maintenance Manual

Advertisement

Table of Contents
loading

Related Manuals for Lenovo ThinkCentre M90s Gen 2

Summary of Contents for Lenovo ThinkCentre M90s Gen 2

  • Page 1 M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...
  • Page 2 First Edition (April 2021) © Copyright Lenovo 2021. 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

    Diagnostics ....Handling electrostatic discharge-sensitive Lenovo diagnostic tools ..devices ....4 UEFI diagnostic program .
  • Page 4 Internal speaker ... . . System board ....Illuminated red dot cable ..VRM heatsink (for selected models of M90s Gen 2) .

  • 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 2021...
  • Page 6 M70s Gen 2 and M90s Gen 2 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 2021...

  • 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) M70s Gen 2 and M90s Gen 2 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 M70s Gen 2 and M90s Gen 2 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: M70s Gen 2 and M90s Gen 2 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 2021...

  • 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. Storage drive activity indicator ® 6. ThinkCentre 7. Microphone connector 8. Headset connector ® 9. USB-C (3.2 Gen 1) connector 10. USB 3.2 connectors Gen 1 12. Internal speaker* 11. USB 3.2 connectors Gen 2 * for selected models © Copyright Lenovo 2021...
  • Page 36 M90s Gen 2 1. Optical drive eject button* 2. Optical drive activity indicator* 3. SD-card slot* 4. Power button 5. Storage drive activity indicator ® 6. ThinkCentre 7. Microphone connector 8. Headset connector ® 9. USB-C (3.2 Gen 2) connector 10.

  • Page 37: Rear

    Rear M70s Gen 2 ™ 1. Audio line-out connector 2. HDMI out connector ™ 3. DisplayPort out connectors 4. USB 2.0 connector 5. USB 2.0 connector (with smart power on) 6. Security-lock slot 8. PS/2 keyboard connector* 7. PS/2 mouse connector* 9.
  • Page 38 M90s Gen 2 ™ 2. DisplayPort out connectors 1. Audio line-out connector 3. Optional connector* 4. USB 3.2 connectors Gen 1 5. USB 3.2 connectors Gen 1 (with smart power on) 6. Security-lock slot 7. Serial connector 8. PS/2 mouse connector* 9.

  • Page 39: 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 2021...

  • Page 40: 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 41: 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 42: 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 43 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 44: 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 45 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 46 M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 47: Chapter 5. Troubleshooting And Diagnostics

    4. Run the diagnostic program. See “Diagnostics” on page 49. 5. Recover your operating system. See “Recovery” on page 50. 6. If the problem persists, contact Lenovo. Troubleshooting Use the troubleshooting information to find solutions to problems that have definite symptoms.

  • Page 48: Startup Problems

    Startup problems Problem Solution • Ensure that the power cord is correctly connected to the rear of the computer and to a working electrical outlet. • If the computer has a secondary power switch on the rear of the The computer does not start up when you computer, ensure that it is switched on.

  • Page 49: Audio Problems

    Audio problems Problem Solution • If you are using powered external speakers that have an On/Off control, ensure that: – The On/Off control is set to the On position. – The speaker power cable is connected to a properly grounded, functional ac electrical outlet.
  • Page 50 Problem Solution • Connect the cable from the Ethernet connector to the RJ45 connector of the hub. • Enable the Ethernet LAN feature in UEFI BIOS. • Enable the Ethernet LAN adapter. 1. Go to Control Panel and view by large icons or small icons. 2.
  • Page 51 Problem Solution • Enable the Bluetooth feature in UEFI BIOS. • Enable all Bluetooth devices. 1. Right-click the Start button to open the Start context menu. 2. Click Device Manager. Type the administrator password or provide confirmation if prompted. 3. Expand Bluetooth to display all Bluetooth devices. Right-click each Bluetooth device, and then click Enable device.

  • Page 52: Performance Problems

    Performance problems Problem Solution Note: Depending on the volume of the storage drives and amount of data stored on the storage drives, the disk-defragmentation process might take up to several hours. 1. Close any open programs and windows. 2. Open the Start menu. Excessive fragmented files exist on the 3.

  • Page 53: Storage Drive Problems

    Storage drive problems Problem Solution • Ensure that the signal cables and power cables for all the storage drives are connected correctly. • Ensure that the computer is configured correctly to support the storage drives. Some or all storage drives are missing from –...

  • Page 54: Serial Connector Problems

    Problem Solution • Disable any background programs, such as AntiVirus or Desktop The playback is slow or choppy. Themes. • Ensure that video resolution is less than 1152 x 864 pixels. • Ensure that the disc is in the drive with the shiny side of the disc facing down.

  • Page 55: Software Problems

    Use diagnostic solutions to test hardware components and report operating-system-controlled settings that interfere with the correct operation of your computer. Lenovo diagnostic tools For information about Lenovo diagnostic tools, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions 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 56: The Vantage App

    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 57: Use Advanced Options

    Windows recovery programs are damaged. If you did not create a recovery USB drive as a precautionary measure, you can contact Lenovo Customer Support Center and purchase one from Lenovo. For a list of the Lenovo Support phone numbers for your country or region, go to: https://pcsupport.lenovo.com/supportphonelist Create a recovery USB drive Attention: The creation process deletes anything stored on the USB drive.

  • Page 58: Update The Device Driver

    • From Windows Update: Note: The device drivers provided by Windows Update might not be tested by Lenovo. It is recommended that you get device drivers from Lenovo. 1. Open the Start menu.

  • Page 59: 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 2021...

  • Page 60: 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 61 Number Description Self-service CRU Optional-service CRU Heat sink and fan assembly Memory module Coin-cell battery Microprocessor System board Wi-Fi card* Wi-Fi card shield* Chapter 6 Hardware removal and installation...
  • Page 62 Number Description Self-service CRU Optional-service CRU M.2 solid-state drive* M.2 solid-state drive bracket* VRM heatsink* Heat sink for the M.2 Solid-state drive (type 2)* Heat sink for the M.2 Solid-state drive (type 3)* Thermal pad Cover presence switch Card reader* Card reader bracket* Illuminated red dot cable Power button cable...
  • Page 63 Number Description Self-service CRU Optional-service CRU PCI-Express connector cable* Computer cover * 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 64: System Board

    System board M70s Gen 2 8-pin power connector PS/2 keyboard and mouse connector Microprocessor socket Microprocessor fan connector Memory slot (DIMM1) Memory slot (DIMM2) Memory slot (DIMM3) Memory slot (DIMM4) Illuminated red dot connector Power button connector Internal speaker connector 10-pin power connector SATA power connectors Auxiliary fan connector...

  • Page 65: M90S Gen 2

    PCI Express x16 Gen 4 graphics card slot Cover presence switch connector (intrusion switch connector) System fan connector E-lock connector M90s Gen 2 8-pin power connector PS/2 keyboard and mouse connector Microprocessor socket Microprocessor fan connector Memory slot (DIMM1) Memory slot (DIMM2) Memory slot (DIMM3) Memory slot (DIMM4) Illuminated red dot connector...

  • Page 66: Removing And Installing Hardware

    Serial (COM2) connector M.2 solid-state drive Gen 4 slot PCI Express card slot (physical link width x16; PCI Express x1 card slot negotiable link width x4, x1) E-lock connector PCI Express x16 Gen 4 graphics card slot System fan connector Cover presence switch connector (intrusion switch connector) Removing and installing hardware...

  • Page 67: Computer Cover

    Removal steps 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 68: Front Bezel

    Removal steps 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 the “Computer cover” on page 61. Replacement procedure M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 69: 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 61. 2. Disconnect the signal and power cable from the optical drive. Removal steps Chapter 6 Hardware removal and installation...

  • Page 70: 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: • “Computer cover” on page 61 • “Front bezel” on page 62 Replacement procedure M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 71: Hard Disk Drive

    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 72 Removal steps 2.5-inch primary hard disk drive Remove the storage converter with the 2.5-inch primary hard disk drive. See “3.5-inch primary hard disk drive” on page 65. M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...
  • Page 73 Removal steps 2.5-inch secondary hard disk drive For access, do the following: 1. Remove these parts in order: • “Computer cover” on page 61 • “Front bezel” on page 62 • “Optical drive” on page 63 • “Drive bay assembly” on page 64 2.

  • Page 74: 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. The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
  • Page 75 M.2 solid-state drive Gen 4 slot (for M90s Gen 2) M.2 solid-state drive Gen 3 slot For access, remove the “Computer cover” on page 61. Remove the M.2 solid-state drive Gen 4 and the heat sink (if any) depending on the computer model. •...
  • Page 76 Note: When installing the M.2 solid-state drive Gen 4 and the heat sink, remove the film that covers the thermal pad (if any). M.2 solid-state drive Gen 3 For access, remove these parts in order: • “Computer cover” on page 61 •...
  • Page 77 – Type 2 – Type 3 Chapter 6 Hardware removal and installation...

  • Page 78: M.2 Solid-State Drive Bracket

    Note: When installing the M.2 solid-state drive Gen 3 and the heat sink, remove the film that covers the thermal pad (if any). 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: •...

  • Page 79: Wi-Fi Card

    Wi-Fi 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: • “Computer cover” on page 61 • “Front bezel” on page 62 • “Drive bay assembly” on page 64 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.

  • Page 80: Rear Wi-Fi Antenna

    Removal steps Rear Wi-Fi antenna Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Removal steps 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. M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...
  • Page 81 For access, remove these parts in order: • “Computer cover” on page 61 • “Front bezel” on page 62 • “Drive bay assembly” on page 64 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.

  • Page 82: Pci-Express Connector Cable

    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 the “Computer cover” on page 61. 2. Disconnect the cable from the system board. Removal steps PCI-Express card Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 83: Coin-Cell Battery

    • Before installing a new PCI-Express card, remove any PCI-Express connector cables that impede the installation. See “PCI-Express connector cable” on page 76. 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 84: Power Supply Assembly

    To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” in the Safety and Warranty Guide. For access, remove these parts in order: • “Computer cover” on page 61 • “Front bezel” on page 62 • “Drive bay assembly” on page 64 Removal steps Note: After installing a new coin-cell battery, reset the system date and time in the UEFI BIOS menu.

  • Page 85: E-Lock

    • “Computer cover” on page 61 • “Front bezel” on page 62 • “Drive bay assembly” on page 64 2. Disconnect the power supply assembly cables from the system board. Removal steps E-lock Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • 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: • “Computer cover” on page 61 • “Front bezel” on page 62 •...

  • Page 87: 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: • “Computer cover” on page 61 • “Front bezel” on page 62 •...
  • Page 88 • “Front bezel” on page 62 • “Drive bay assembly” on page 64 2. Disconnect the power button cable and the card reader cable from the system board. Replacement procedure M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 89: Card Reader And Card Reader Bracket

    Card reader and card reader bracket 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: • “Computer cover” on page 61 • “Front bezel” on page 62 •...

  • Page 90: 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. CAUTION: 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, do the following: 1.
  • Page 91 • Type 2 (for selected models of M90s Gen 2) Chapter 6 Hardware removal and installation...
  • Page 92 M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 93: Microprocessor

    Microprocessor Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. CAUTION: 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 FRUs in order, if any: •...
  • Page 94 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: • “Computer cover” on page 61 •...

  • Page 95: Vrm Heatsink (For Selected Models Of M90S Gen 2)

    Notes: • For computers with 125-watt CPU, ensure that a new VRM heat sink is installed when you replace the system board. If the new system board does not come with a VRM heat sink, see “VRM heatsink (for selected models of M90s Gen 2)” on page 89 to install one first. (VRM heatsink is not applicable for the computers with 65-watt CPU.) •...

  • Page 96: Cover Presence Switch

    • “Heat sink and fan assembly” on page 84 • “System board” on page 87 Replacement procedure Cover presence switch Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.
  • Page 97 Removal steps Chapter 6 Hardware removal and installation...
  • Page 98 M70s Gen 2 and M90s Gen 2 Hardware Maintenance Manual...

  • Page 99: 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 100 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.

This manual is also suitable for:

Thinkcentre m70s gen 2Thinkstation p348

Table of Contents