Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual
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Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual

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M90a Gen 3 and M90a Pro Gen3
Hardware Maintenance Manual

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  • Page 1 M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual...
  • Page 2 First Edition (April 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

    UEFI diagnostic program ... Notices and trademarks ..1 Lenovo diagnostic tools ... © Copyright Lenovo 2022...
  • Page 4 M90a Gen 3 and M90a Pro Gen3 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 M90a Gen 3 and M90a Pro Gen3 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) M90a Gen 3 and M90a Pro Gen3 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 M90a Gen 3 and M90a Pro Gen3 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: M90a Gen 3 and M90a Pro Gen3 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

    3. Integrated camera or Infrared (IR) camera shield* 4. IR camera activity indicator* 6. Microphone mute/unmute indicator* 5. Multi-touch screen* 7. System status indicator 8. Microphone mute/unmute control 9. Monitor / computer mode switch 10. USB 3.2 connector Gen 2 © Copyright Lenovo 2022...
  • Page 36 11. Headset connector 12. SD-card slot* 14. Optical drive activity indicator* 13. Power button 15. Optical drive eject button* * for selected models System status indicator Show the system status of your computer. • Blinking for three times: The computer is initially connected to power. •...

  • Page 37: Rear

    Rear ™ 2. DisplayPort out connector 1. Serial connector* ™ 3. HDMI in 1.4/Out 2.1 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. USB 3.2 connectors Gen 1 ®...
  • Page 38 M90a Gen 3 and M90a Pro Gen3 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 2022...

  • 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: Miscellaneous Error Conditions

    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 Message/Symptom FRU/Action 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. System Board diagnostics diskette in the first 3.5-inch diskette drive. 2. Diskette Drive Cable 3.

  • Page 45: Undetermined Problems

    Message/Symptom FRU/Action Serial or parallel connector device failure (adapter 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4. Alternate Adapter 5. System Board Some or all keys on the keyboard do not work 1. Keyboard 2. Keyboard Cable 3.
  • Page 46 M90a Gen 3 and M90a Pro Gen3 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 3 and M90a Pro Gen3 Hardware Maintenance Manual...

  • Page 51: 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 52: 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 53 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 Chapter 6 Hardware removal and installation...
  • Page 54 Number Description Self-service CRU Optional-service CRU ® 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 with cable* Optical drive bracket* Hard disk drive bracket* (for the secondary hard disk drive only) Middle frame (LCD panel bracket)
  • Page 55 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 56: System Board

    System board M90a Gen 3 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...
  • Page 57 Serial (COM1) connector SATA2 (SATA 3.0) DisplayPort out connector HDMI in and out connector Ethernet connector USB-C (3.2 Gen 2) connector USB 3.2 connectors Gen 1 Speaker connector Radar card connector Memory slot (DDR4 DIMM2) Memory slot (DDR4 DIMM1) Card reader connector Headset connector USB 3.2 connector Gen 2 USB 3.2 connector Gen 2...

  • Page 58: Removing And Installing Hardware

    LCD backlight connector M.2 solid-state drive slot Microprocessor socket GPU board connector Integrated camera and microphone module connector System fan connector Cover presence switch connector (intrusion switch Optical drive power connector connector) Hard disk drive power connector Power supply unit connector LCD LVDS2 connector M.2 Wi-Fi card slot SATA1 (SATA 3.0)
  • Page 59 3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up. Replacement procedure Depending on your computer stand, refer to one of the following to replace the computer stand.
  • Page 60 • UltraFlex V Stand M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual...
  • Page 61 Chapter 6 Hardware removal and installation...

  • Page 62: 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: M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual...

  • Page 63: System Board Shield

    1. Turn off the computer and remove all connected devices and cables. 2. Unlock any locking device that secures the computer cover. 3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the computer cover is facing up.

  • Page 64: 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 56. •...

  • Page 65: Cover Presence Switch (Intrusion Switch)

    Cover presence switch (intrusion switch) Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. For access, do the following: 1. Remove the following parts in order, if any: • “Computer stand” on page 52. •...

  • Page 66: Optical Drive

    • Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks. For access, remove the following parts in order, if any: •...

  • Page 67: Secondary Hard Disk Drive And Bracket

    Removal steps 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 68 • Do not apply pressure to the internal storage drive. • Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks. For access, remove the following parts in order, if any: •...

  • Page 69: M.2 Solid-State Drive

    M.2 solid-state 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 70: 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 56. • “System board shield” on page 57. • “VESA mount bracket” on page 58. Removal procedure Wi-Fi card and Wi-Fi card shield Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

  • Page 71: Serial Connector Module

    • “System board shield” on page 57. • “VESA mount bracket” on page 58. 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: •...

  • Page 72: Card Reader Board

    Card reader board 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 56. •...

  • Page 73: System Fan

    Removal steps 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: • “Computer stand” on page 52. • “Rear I/O cover” on page 56. •...

  • Page 74: Heat Sink

    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. For access, remove the following parts in order, if any: •...

  • Page 75: System Board

    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. For access, remove the following parts in order, if any: • “Computer stand” on page 52. •...

  • Page 76: Coin-Cell Battery

    • “Cover presence switch (intrusion switch)” on page 59. • “Primary hard disk drive” on page 59. • “Secondary hard disk drive and bracket” on page 61. • “Optical drive” on page 60. • “M.2 solid-state drive” on page 63. •...
  • Page 77 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). A coin-cell battery keeps this information active when you turn off the computer. The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell battery lasts forever.

  • Page 78: Integrated Camera And Microphone Module

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

  • Page 79: Power Supply Assembly (With Ac-In Bracket)

    Power supply assembly (with AC-in 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 56. •...

  • Page 80: Side I/O Brackets

    Side I/O brackets 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 56. •...

  • Page 81: Main Frame

    Removal procedure of the side I/O brackets 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: • “Computer stand” on page 52. •...

  • Page 82: Front Decoration Cover

    • “Primary hard disk drive” on page 59. • “Secondary hard disk drive and bracket” on page 61. • “Optical drive” on page 60. • “M.2 solid-state drive” on page 63. • “Memory module” on page 63. • “Wi-Fi card and Wi-Fi card shield” on page 64. •...
  • Page 83 • “Computer stand” on page 52. • “Rear I/O cover” on page 56. • “System board shield” on page 57. • “VESA mount bracket” on page 58. • “Cover presence switch (intrusion switch)” on page 59. • “Primary hard disk drive” on page 59. •...

  • Page 84: Radar Card

    Radar 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: • “Computer stand” on page 52. • “Rear I/O cover” on page 56. •...

  • Page 85: Internal Speakers

    Removal procedure 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 56. •...

  • Page 86: Lcd Bracket And Lcd Panel

    • “Side I/O brackets” on page 74. • “Main frame” on page 75. • “Front decoration cover” on page 76. Removal procedure LCD bracket and LCD panel Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following: 1.

  • Page 87: Wi-Fi Antennas

    • “Heat sink” on page 68. • “Microprocessor” on page 68. • “System board” on page 69. • “Power supply assembly (with AC-in bracket)” on page 73. • “Integrated camera and microphone module” on page 72. • “Side I/O brackets” on page 74. •...

  • Page 88: Lcd Backlight Cable, Touch Board Cable, And Lcd Lvds Cable

    • “Serial connector module” on page 65. • “Card reader board” on page 66. • “GPU card” on page 66. • “System fan” on page 67. • “Heat sink” on page 68. • “Microprocessor” on page 68. • “System board” on page 69. •...
  • Page 89 • “Memory module” on page 63. • “Wi-Fi card and Wi-Fi card shield” on page 64. • “Serial connector module” on page 65. • “Card reader board” on page 66. • “GPU card” on page 66. • “System fan” on page 67. •...
  • Page 90 M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual...

  • Page 91: 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 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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