Lenovo 12SH001MUS Hardware Maintenance Manual
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Lenovo 12SH001MUS Hardware Maintenance Manual

Lenovo 12SH001MUS Hardware Maintenance Manual

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M90a Gen 5
Hardware Maintenance Manual

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  • Page 1 M90a Gen 5 Hardware Maintenance Manual...
  • Page 2 First Edition (November 2023) © Copyright Lenovo 2023. 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

    Notices and trademarks ..1 UEFI diagnostic program ... Lenovo diagnostic tools ... © Copyright Lenovo 2023...
  • Page 4 M90a Gen 5 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 2023...
  • Page 6 M90a Gen 5 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 2023...

  • Page 8: Electrical Safety

    • Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage. • Do not service the following parts with the power on when they are removed from their normal operating places in a machine: M90a Gen 5 Hardware Maintenance Manual...

  • 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

    The caution and danger safety notices in this section are provided in the following languages: • English • Arabic • Brazilian/Portuguese • Chinese (simplified) • Chinese (traditional) • French • German • Hebrew • Italian • Korean M90a Gen 5 Hardware Maintenance Manual...
  • 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 The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. M90a Gen 5 Hardware Maintenance Manual...
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) M90a Gen 5 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 O dispositivo também pode ter mais de um cabo de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que todos os cabos de alimentação estejam desconectados da fonte de alimentação. M90a Gen 5 Hardware Maintenance Manual...
  • Page 17 Chapter 1 Important safety information...
  • Page 18 M90a Gen 5 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Important safety information...
  • Page 20 (sauf instruction contraire mentionnée dans les procédures d'installation et de configuration). • Lorsque vous installez, que vous déplacez, ou que vous manipulez le présent produit ou des périphériques qui lui sont raccordés, reportez-vous aux instructions ci-dessous pour connecter et déconnecter les différents cordons. M90a Gen 5 Hardware Maintenance Manual...
  • 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 • Alle angeschlossenen Geräte ebenfalls an Schutzkontaktsteckdosen mit ordnungsgemäß geerdetem Schutzkontakt anschließen. • Die Signalkabel nach Möglichkeit einhändig anschließen oder lösen, um einen Stromschlag durch Berühren von Oberflächen mit unterschiedlichem elektrischem Potenzial zu vermeiden. M90a Gen 5 Hardware Maintenance Manual...
  • 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 Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit nicht unterbrochen. Die Einheit kann auch mit mehreren Netzkabeln ausgestattet sein. Um die Stromversorgung für die Einheit vollständig zu unterbrechen, müssen alle zum Gerät führenden Netzkabel vom Netz getrennt werden. M90a Gen 5 Hardware Maintenance Manual...
  • 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. M90a Gen 5 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 Il pulsante di controllo dell'alimentazione presente sull'unità e l'interruttore dell'alimentatore non disattivano l'alimentazione corrente fornita all'unità. E' possibile che l'unità disponga di più cavi di alimentazione. Per disattivare l'alimentazione dall'unità, accertarsi che tutti i cavi di alimentazione siano scollegati dalla fonte di alimentazione. M90a Gen 5 Hardware Maintenance Manual...
  • Page 29 Chapter 1 Important safety information...
  • Page 30 • No conecte ni desconecte los cables ni realice ninguna tarea de instalación, mantenimiento o reconfiguración de este producto durante una tormenta eléctrica. • Conecte todos los cables de alimentación a tomas de corriente debidamente cableadas y conectadas a tierra. M90a Gen 5 Hardware Maintenance Manual...
  • 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 Además, el dispositivo podría tener más de un cable de alimentación. Para suprimir toda la corriente eléctrica del dispositivo, asegúrese de que todos los cables de alimentación estén desconectados de la toma de corriente. M90a Gen 5 Hardware Maintenance Manual...

  • 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 2023...

  • 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

    3. Integrated camera or Infrared (IR) camera* 4. Integrated camera or Infrared (IR) camera shield* 5. IR camera activity indicator* 6. Multi-touch screen* 7. Microphone mute/unmute indicator* 8. System status indicator 9. Microphone mute/unmute control 10. Monitor/computer mode switch © Copyright Lenovo 2023...
  • Page 36 • Off: The computer is off or in hibernation mode. • Blinking rapidly: The computer is entering sleep or hibernation mode. • Blinking slowly: The computer is in sleep mode. Related topics • “USB specifications” on page 32. M90a Gen 5 Hardware Maintenance Manual...

  • Page 37: Rear

    Rear ™ 2. DisplayPort out connector 1. Serial connector* ™ 3. HDMI in 1.4/out 2.1 TMDS combo connector 4. Ethernet connector 6. USB 3.2 connector Gen 1 (with smart power-on ® 5. USB-C (3.2 Gen 2) connector feature) 8. Security-lock slot 7.

  • Page 38: Usb Specifications

    • Connect to USB-C accessories to help expand your computer functionality. To purchase USB-C accessories, go to https://www.lenovo.com/accessories • USB-C (3.2 Gen 1) connector • USB-C (3.2 Gen 2) connector • USB-C (Thunderbolt 3) connector • USB-C (Thunderbolt 4) connector M90a Gen 5 Hardware Maintenance Manual...

  • 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 2023...

  • Page 40: Symptom-To-Fru Index

    The start-up drive is not in the boot sequence in Check the configuration and ensure that the start-up drive configuration. is in the boot sequence. No operating system installed on the boot drive. Install an operating system on the boot drive. M90a Gen 5 Hardware Maintenance Manual...

  • 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

    Press F10 to exit. 1762 Storage device configuration change This error message is displayed has occurred when a hard disk drive change or an optical drive change has been made. Press F10 to exit. M90a Gen 5 Hardware Maintenance Manual...

  • Page 43: 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 44 First device - network b. Second device - hard disk 2. Hard disk drive RPL computer does not RPL from server 1. Check the startup sequence. 2. Check the network adapter LED status. M90a Gen 5 Hardware Maintenance Manual...

  • Page 45: 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 46 M90a Gen 5 Hardware Maintenance Manual...

  • Page 47: Chapter 5. Diagnostics

    4. Run the diagnostic program. 5. Recover your operating system. See “Self-help resources” on page 42. 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 48: 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 49 • 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 50 M90a Gen 5 Hardware Maintenance Manual...

  • Page 51: Chapter 6. Hardware Removal And Installation

    Screw driver: Philips Head 01 1, Shank length greater than 6 ThinkSation/DT Common tool inches Screw driver: Philips Head 02 2, Shank length greater than 6 ThinkSation/SC/DT Common tool inches Screw driver: Torx Head T5 IdeaPad Common tool © Copyright Lenovo 2023...
  • Page 52 ThinkCentre/Tiny Common tool Tiny antenna) Silicone grease for CPU or heatsink Consumable repairing Polyamide tape Consumable Mylar tape Consumable Eraser Consumable Electrical tape Consumable Double sided tape Consumable Conductive tape Consumable Cleaning pads/wipes Consumable M90a Gen 5 Hardware Maintenance Manual...

  • Page 53: Major Frus And Crus

    Tool name Specific Product scope Tool type Heat gun Special tool Brown brush 25 mm to 35 mm wide Special tool Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps.
  • Page 54 M90a Gen 5 Hardware Maintenance Manual...
  • Page 55 Number Description Self-service CRU Optional-service CRU UltraFlex V Stand* UltraFlex V Stand base* Full-function monitor stand* Full-function monitor stand base* System board shield ® VESA mount bracket Cover presence switch (intrusion switch)* Internal speakers (2) Microprocessor System board Power supply assembly (with AC-in bracket) Hard disk drive* Hard disk drive cable* Optical drive*...
  • Page 56 Dummy cover for serial connector module* Dummy optical drive bezel* Mylar over the computer stand hole* For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go http://www.lenovo.com/serviceparts-lookup M90a Gen 5 Hardware Maintenance Manual...

  • Page 57: System Board

    System board M.2 solid-state drive slot LCD backlight connector GPU board connector Microprocessor socket Integrated camera and microphone module connector System fan connector Touch board connector Cover presence switch connector (intrusion switch connector) Optical drive power connector Hard disk drive power connector Power supply unit connector LCD LVDS connector M.2 Wi-Fi card slot...

  • Page 58: Removing And Installing Hardware

    Depending on your computer stand, refer to one of the following to replace the computer stand. • Full-function monitor stand M90a Gen 5 Hardware Maintenance Manual...
  • Page 59 Chapter 6 Hardware removal and installation...
  • Page 60 • Tilt-only stand M90a Gen 5 Hardware Maintenance Manual...
  • Page 61 • UltraFlex V Stand Chapter 6 Hardware removal and installation...
  • Page 62 M90a Gen 5 Hardware Maintenance Manual...

  • Page 63: Rear I/O Cover

    Rear I/O cover Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Before you open the rear cover, turn off the computer and wait several minutes until the computer is cool. For access, do the following: Chapter 6 Hardware removal and installation...

  • Page 64: System Board Shield

    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 stand” on page 52. • “Rear I/O cover” on page 57. M90a Gen 5 Hardware Maintenance Manual...

  • Page 65: Vesa Mount Bracket

    Removal procedure VESA mount 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: • “Computer stand” on page 52. • “Rear I/O cover” on page 57. •...

  • Page 66: Cover Presence Switch (Intrusion Switch)

    • Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for frequent changes or replacement. • Before replacing the internal storage drive, make a backup copy of all the data that you want to keep. M90a Gen 5 Hardware Maintenance Manual...

  • Page 67: Optical Drive

    • Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get damaged. • 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.
  • Page 68 M90a Gen 5 Hardware Maintenance Manual...

  • Page 69: Secondary Hard Disk Drive And Bracket

    Secondary hard disk drive and 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 70: M.2 Solid-State Drive

    • 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. • Do not apply pressure to the internal storage drive. M90a Gen 5 Hardware Maintenance Manual...

  • Page 71: Memory Module

    • 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 following parts in order: • “Computer stand” on page 52. •...

  • Page 72: Wi-Fi Card And Wi-Fi Card Shield

    For access, remove the following parts in order, if any: • “Computer stand” on page 52. • “Rear I/O cover” on page 57. • “System board shield” on page 58. • “VESA mount bracket” on page 59. M90a Gen 5 Hardware Maintenance Manual...

  • Page 73: Serial Connector Module

    Removal steps Serial connector module 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 stand” on page 52. • “Rear I/O cover” on page 57. •...

  • Page 74: Card Reader Board

    For access, remove the following parts in order, if any: • “Computer stand” on page 52. • “Rear I/O cover” on page 57. • “System board shield” on page 58. • “VESA mount bracket” on page 59. M90a Gen 5 Hardware Maintenance Manual...

  • Page 75: System Fan

    Removal steps Torque Screw (quantity) Color M3 x 4 mm (4) Silver 3.0 ± 0.1 lb/in System fan 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 76: Heat Sink

    The screws cannot be removed from the heat sink. • You might have to gently twist the heat sink to free it from the microprocessor. • Do not touch the thermal grease while handling the heat sink. M90a Gen 5 Hardware Maintenance Manual...

  • Page 77: Microprocessor

    Screw (quantity) Color Torque M3 x L6 (4) Silver 3.0 ± 0.5 lb/in M3 x L5 (2) Silver 3.0 ± 0.5 lb/in Microprocessor Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. CAUTION: 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 78: System Board

    • “Heat sink” on page 70. • “Microprocessor” on page 71. 2. Record the cable routing and cable connections, and then disconnect all cables from the system board. See “System board” on page 51. M90a Gen 5 Hardware Maintenance Manual...

  • Page 79: Integrated Camera And Microphone Module

    Removal procedure Notes: • Handle the system board carefully by its edges. • The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling. Screw (quantity) Color Torque M3 x 4 mm (7) Silver 3.0 ±...

  • Page 80: Power Supply Assembly (With Ac-In Bracket)

    For access, remove the following parts in order, if any: • “Computer stand” on page 52. • “Rear I/O cover” on page 57. • “System board shield” on page 58. • “VESA mount bracket” on page 59. Removal procedure M90a Gen 5 Hardware Maintenance Manual...

  • Page 81: Left I/O Bracket

    Screw (quantity) Color Torque M3 x 4 mm (6) Silver 3.0 ± 0.1 lb/in Left I/O 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 82: Right Bezel

    • “Computer stand” on page 52. • “Rear I/O cover” on page 57. • “System board shield” on page 58. • “VESA mount bracket” on page 59. • “Power supply assembly (with AC-in bracket)” on page 74. M90a Gen 5 Hardware Maintenance Manual...

  • Page 83: Main Frame

    Removal procedure of the right bezel Screw (quantity) Color Torque M3 x 4 mm (2) Silver 3.0 ± 0.1 lb/in Main frame 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 84: Front Decoration Cover

    • “VESA mount bracket” on page 59. • “Cover presence switch (intrusion switch)” on page 60. • “Primary hard disk drive” on page 60. • “Secondary hard disk drive and bracket” on page 63. • “Optical drive” on page 61. M90a Gen 5 Hardware Maintenance Manual...

  • Page 85: Radar Card

    • “M.2 solid-state drive” on page 64. • “Memory module” on page 65. • “Wi-Fi card and Wi-Fi card shield” on page 66. • “Serial connector module” on page 67. • “Card reader board” on page 68. • “GPU card” on page 68. •...
  • Page 86 • “Left I/O bracket” on page 75. • “Right bezel” on page 76. • “Main frame” on page 77. • “Front decoration cover” on page 78. 2. Disconnect the radar card cable from the system board. Removal procedure M90a Gen 5 Hardware Maintenance Manual...

  • Page 87: Internal Speakers

    Internal speakers 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 stand” on page 52. • “Rear I/O cover” on page 57. •...

  • Page 88: Lcd Bracket And Lcd Panel

    • “Wi-Fi card and Wi-Fi card shield” on page 66. • “Serial connector module” on page 67. • “Card reader board” on page 68. • “GPU card” on page 68. • “System fan” on page 69. • “Heat sink” on page 70. M90a Gen 5 Hardware Maintenance Manual...

  • Page 89: Wi-Fi Antennas

    • “Microprocessor” on page 71. • “System board” on page 72. • “Power supply assembly (with AC-in bracket)” on page 74. • “Integrated camera and microphone module” on page 73. • “Left I/O bracket” on page 75. • “Right bezel” on page 76. •...

  • Page 90: Lcd Backlight Cable, Touch Board Cable, And Lcd Lvds Cable

    • “Computer stand” on page 52. • “Rear I/O cover” on page 57. • “System board shield” on page 58. • “VESA mount bracket” on page 59. • “Cover presence switch (intrusion switch)” on page 60. M90a Gen 5 Hardware Maintenance Manual...
  • Page 91 • “Primary hard disk drive” on page 60. • “Secondary hard disk drive and bracket” on page 63. • “Optical drive” on page 61. • “M.2 solid-state drive” on page 64. • “Memory module” on page 65. • “Wi-Fi card and Wi-Fi card shield” on page 66. •...
  • Page 92 M90a Gen 5 Hardware Maintenance Manual...

  • Page 93: 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 94 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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