Lenovo 11A9000DGE Hardware Maintenance Manual
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Lenovo 11A9000DGE Hardware Maintenance Manual

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M75s-1
Hardware Maintenance Manual

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Summary of Contents for Lenovo 11A9000DGE

  • Page 1 M75s-1 Hardware Maintenance Manual...
  • Page 2 First Edition (October 2019) © Copyright Lenovo 2019. 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

    ....4 Lenovo diagnostic tools ..Grounding requirements ... . 4 UEFI diagnostic program .
  • Page 4 Wi-Fi antennas ... . . System board ....105 Heat sink and fan assembly ..Chapter 7.

  • 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 2019...
  • Page 6 M75s-1 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 2019...

  • 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) M75s-1 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 M75s-1 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: M75s-1 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

    Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code might also cause false error © Copyright Lenovo 2019...

  • Page 34: Strategy For Replacing Frus For Cto, Special-Bid, And Standard Models

    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

    4. Storage drive activity indicator 6. Microphone connector 5. SD-card reader slot* 7. Headphone connector 8. USB 3.1 Gen 2 connectors (2) ® 9. USB 3.1 Gen 1 connectors (2) 10. ThinkCentre 11. Internal speaker* * for selected models © Copyright Lenovo 2019...

  • Page 36: Rear

    Note: You are responsible for evaluating, selecting, and implementing the locking device and security feature. Lenovo makes no comments, judgments, or warranties about the function, quality, or performance of the locking device and security feature. You can purchase computer locks from Lenovo.
  • Page 37 Padlock Locking the computer cover through a padlock prevents unauthorized access to the inside of your computer. Kensington-style cable lock Lock your computer to a desk, table, or other fixtures through a Kensington-style cable lock. Chapter 3 Product overview...
  • Page 38 M75s-1 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 2019...

  • 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 Diskette drive in-use light remains on or does not light 1. Diskette Drive when drive is active. 2. System Board 3. Diskette Drive Cable Blank screen except for flashing cursor. 1. System Board 2. Primary Hard Disk Drive 3.

  • Page 45: Undetermined Problems

    Message/Symptom FRU/Action RPL computer does not RPL from server 1. Check the startup sequence. 2. Check the network adapter LED status. Serial or parallel connector device failure (system board 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4.
  • Page 46 M75s-1 Hardware Maintenance Manual...

  • Page 47: Chapter 5. Troubleshooting, Diagnostics, And Recovery

    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: Network Problems

    Network problems Note: The Wi-Fi and Bluetooth features are optional. 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.
  • 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 This section introduces a set of Lenovo diagnostic tools. For more information, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer.

  • Page 56: Recovery

    Table 1. Items on the main screen of the UEFI diagnostic program DIAGNOSTICS TOOLS • CPU [1] • SYSTEM INFORMATION [F1] • DISPLAY [2] • BAD BLOCK RECOVERY [F2] • KEYBOARD [3] • SMART INFORMATION [F3] • MEMORY [4] • MOTHERBOARD [5] •...

  • Page 57: Windows Automatic Recovery

    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

    Download and install the latest driver by one of the following methods: • From Lenovo Vantage: Open Lenovo Vantage to check the available update packages. If the latest UEFI BIOS update package is available, follow the on-screen instructions to download and install the package.

  • 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 2019...

  • 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 Computer cover Wi-Fi card shield* Memory module Microprocessor System board Coin-cell battery Wi-Fi card* M.2 solid-state drive* M.2 solid-state drive bracket* Secondary storage drive bracket Secondary storage drive (a 2.5- inch storage drive) Internal speaker* Card reader* Optical drive cable* Power button board...
  • Page 62 Description Self-service CRU Optional-service CRU Heat sink and fan assembly Heat sink fan duct * 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 M75s-1 Hardware Maintenance Manual...

  • Page 63: System Board

    System board 4-pin power connector Microprocessor socket Microprocessor fan connector Memory slot (DIMM1) Memory slot (DIMM2) Memory slot (DIMM3) Memory slot (DIMM4) Auxiliary fan connector 2 Power button board connector Storage drive activity indicator SATA power connectors (2) 10-pin power connector Coin-cell battery SATA 3.0 connectors (3) Clear CMOS (Complementary Metal Oxide...

  • Page 64: Removing And Installing Hardware

    M.2 Wi-Fi card slot PCI Express x16 graphics card slot System fan connector 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 65 5. Disassemble the vertical stand. 6. Assemble the vertical stand. Chapter 6 Hardware removal and installation...

  • Page 66: Dust Shield

    7. Install the vertical stand. 8. Reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Dust shield Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
  • Page 67 5. Remove the dust shield. 6. Install the dust shield. 7. Reinstall all the removed parts. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Chapter 6 Hardware removal and installation...

  • Page 68: Computer Cover

    Computer cover Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1.

  • Page 69: Front Bezel

    8. Install the computer cover. 9. Place the computer in an upright position. 10. Reinstall all the removed parts. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Front bezel Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 70 3. Remove the front bezel. 4. Install the front bezel. 5. Reinstall all the removed parts. 6. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. M75s-1 Hardware Maintenance Manual...

  • Page 71: Optical Drive

    Optical drive Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1.

  • Page 72: Pivot The Drive Bay Assembly Upward And Downward

    7. Install the optical drive bracket. 8. Install the optical drive. 9. Connect the signal cable and the power cable to the new optical drive. 10. Reinstall all the removed parts. 11. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.
  • Page 73 Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3. Remove the front bezel. See “Front bezel” on page 63. 4. Pivot the drive bay assembly upward. 5.

  • Page 74: Primary Storage Drive (A 2.5-Inch Or 3.5-Inch Storage Drive)

    Note: If a locking device is available, use it to lock the computer. Primary storage drive (a 2.5-inch or 3.5-inch storage drive) Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 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 75 6. Remove the primary storage drive. 7. Remove the 3.5-inch primary storage drive from the primary storage drive bracket. Note: If you replace the 2.5-inch primary storage drive, skip this step. Chapter 6 Hardware removal and installation...
  • Page 76 8. Install the 3.5-inch primary storage drive to primary storage drive bracket. Note: If you replace the 2.5-inch primary storage drive, skip this step. 9. Remove the 2.5-inch primary storage drive from the storage converter. Note: If you replace the 3.5-inch primary storage drive, skip this step. M75s-1 Hardware Maintenance Manual...
  • Page 77 10. Install the 2.5-inch primary storage drive to the storage converter. Note: If you replace the 3.5-inch primary storage drive, skip this step. 11. Install the primary storage drive. 12. Connect the signal cable and the power cable to the new primary storage drive. 13.

  • Page 78: 2.5-Inch Secondary Storage Drive

    2.5-inch secondary storage drive Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 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 79 6. Remove the outer 2.5-inch secondary storage drive bracket. 7. Remove the inner 2.5-inch secondary storage drive bracket. 8. Remove the 2.5-inch secondary storage drive. Chapter 6 Hardware removal and installation...
  • Page 80 9. Install the 2.5-inch secondary storage drive. 10. Install the inner 2.5-inch secondary storage drive bracket. 11. Install the outer 2.5-inch secondary storage drive bracket. M75s-1 Hardware Maintenance Manual...

  • Page 81: M.2 Solid-State Drive

    12. Connect the signal cable and the power cable to the new 2.5-inch secondary storage drive. 13. Reinstall all removed parts. 14. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer.
  • Page 82 Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3. Remove the front bezel. See “Front bezel” on page 63. 4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on page 66.
  • Page 83 • Insert the stopper. 7. Refer to the following steps to replace the type 2 M.2 solid-state drive. • Pull out the stopper. • Remove the M.2 solid-state drive. Chapter 6 Hardware removal and installation...
  • Page 84 • Install the M.2 solid-state drive. • Insert the stopper. 8. Reinstall all removed parts. 9. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. M75s-1 Hardware Maintenance Manual...

  • Page 85: Coin-Cell Battery

    If the coin-cell battery is incorrectly replaced, there is danger of an explosion. The coin-cell battery contains a small amount of harmful substance. To avoid possible injury: • Replace only with a battery of the type recommended by Lenovo. • Keep the battery away from fire.

  • Page 86: Memory Module

    6. Install the coin-cell battery. 7. Reinstall all removed parts. 8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Memory module Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 87 Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3. Remove the front bezel. See “Front bezel” on page 63. 4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on page 66.

  • Page 88: Pci Express Card

    7. Reinstall all removed parts. 8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. PCI Express card Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 89 Note: If the card is held in place by a retaining latch, press the latch as shown to disengage the latch. Then, gently remove the card from the slot. 5. Install the PCI Express card. 6. Reinstall all removed parts. 7.

  • Page 90: Wi-Fi Card

    Wi-Fi card Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1.

  • Page 91: Power Supply Assembly

    9. Reconnect the antenna cables to the Wi-Fi card, and install the screw to secure the Wi-Fi card. 10. Install the Wi-Fi card shield. 11. Reinstall all removed parts. 12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.
  • Page 92 Although there are no moving parts in the computer after the power cord has been disconnected, the following warnings are required for your safety and proper Underwriters Laboratories (UL) certification. CAUTION: Hazardous moving parts. Keep fingers and other body parts away. CAUTION: Never remove the cover on a power supply or any part that has the following label attached.

  • Page 93: Power Button Board And Card Reader

    6. Install the power supply assembly. 7. Reinstall all removed parts. 8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Power button board and card reader Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 94 Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3.
  • Page 95 8. Remove the card reader. 9. Install the card reader. 10. Install the card reader bracket. Chapter 6 Hardware removal and installation...

  • Page 96: Thinkcentre Led

    11. Install the power button board. 12. Install the front I/O bracket. 13. Connect the new power button board cable and the new card reader cable to the system board. 14. Reinstall all removed parts. 15. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.
  • Page 97 Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3.

  • Page 98: Internal Speaker

    9. Install the ThinkCentre LED cover. 10. Connect the new ThinkCentre LED cable to the system board. 11. Pivot the drive bay assembly downward, and reinstall the removed parts. 12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.
  • Page 99 Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3. Remove the front bezel. See “Front bezel” on page 63. 4. Disconnect the internal speaker cable from the system board. 5.
  • Page 100 8. Install the internal speaker. 9. Pivot the drive bay assembly downward. M75s-1 Hardware Maintenance Manual...

  • Page 101: Thermal Sensor

    10. Connect the new internal speaker cable to the system board. 11. Reinstall all removed parts. 12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Thermal sensor Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 102 7. Remove the thermal sensor. 8. Install the thermal sensor. M75s-1 Hardware Maintenance Manual...

  • Page 103: Wi-Fi Antennas

    9. Pivot the drive bay assembly downward. 10. Connect the new thermal sensor cable to the system board. 11. Reinstall all removed parts. 12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.
  • Page 104 Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Lay down the computer so that the computer cover facing up. 2. Remove the computer cover. See “Computer cover” on page 62. 3.
  • Page 105 8. Install the rear Wi-Fi antenna. 9. Connect the new Wi-Fi antenna cables to the Wi-Fi card. 10. Reinstall all removed parts. 11. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer.
  • Page 106 2. Remove the computer cover. See “Computer cover” on page 62. 3. Remove the front bezel. See “Front bezel” on page 63. 4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on page 66. 5.
  • Page 107 9. Install the heat sink fan duct. 10. Connect the new microprocessor fan cable to the system board. 11. Pivot the drive bay assembly downward, and reinstall the removed parts. 12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer.

  • Page 108: Microprocessor

    Microprocessor Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1.
  • Page 109 9. Install the microprocessor. 10. Secure the retainer with the handle. 11. Route all the cables that you disconnected from the system board, and then reconnect the cables to the system board. Chapter 6 Hardware removal and installation...

  • Page 110: Cover Presence Switch

    12. Pivot the drive bay assembly downward, and reinstall the removed parts. 13. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. Cover presence switch Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 111 6. Connect the new cover presence switch cable to the system board. 7. Reinstall all removed parts. 8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables to the computer. Note: If a locking device is available, use it to lock the computer. System board Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 112 • Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor. System board replacement procedure 1. Remove the computer cover. See “Computer cover” on page 62. 2. Remove the front bezel. See “Front bezel” on page 63. 3.
  • Page 113 13. Remove the microprocessor from the failing system board, and then install it onto the new system board. 14. Install the new system board into the chassis by aligning the nine screw holes in the new system board with the corresponding mounting studs on the chassis. Then, install the nine screws in the sequence as shown to secure the new system board.
  • Page 114 16. Connect all cables to the new system board. See “System board” on page 57. 17. Connect the external cables and the power cord to the computer. The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling.

  • Page 115: Chapter 7. 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 116 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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