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on development-level systems and there is no guarantee that these measurements will be the same on 
generally available systems. Furthermore, some measurements may have been estimated through 
extrapolation. 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.

For the latest information or any questions or comments, contact or visit the Lenovo Web site: 

https://pcsupport.lenovo.com

Trademarks

LENOVO, LENOVO logo, THINKCENTRE, and THINKCENTRE logo are trademarks of Lenovo. Microsoft and 
Windows are trademarks of the Microsoft group of companies. DisplayPort is a trademark of the Video 
Electronics Standards Association. The terms HDMI and HDMI High-Definition Multimedia Interface are 
trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries. Wi-Fi 
is a registered trademark of Wi-Fi Alliance. USB-C is a trademark of USB Implementers Forum. All other 
trademarks are the property of their respective owners. © 2020 Lenovo.

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M75s Gen 2 Hardware Maintenance Manual

Summary of Contents for ThinkCentre M75s Gen2

Page 1: ...M75s Gen 2 Hardware Maintenance Manual ...

Page 2: ...t Lenovo 2020 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 35F 05925 ...

Page 3: ... Troubleshooting 39 Startup problems 40 Audio problems 41 Network problems 41 Performance problems 44 Storage drive problems 45 CD or DVD problems 45 Serial connector problems 46 USB device problems 46 Software problems 47 Diagnostics 47 Lenovo diagnostic tools 47 UEFI diagnostic program 47 Recovery 48 Restore system files and settings to an earlier point 48 Restore your files from a backup 48 Res...

Page 4: ...Heat sink and fan assembly 77 Microprocessor 78 Cover presence switch 79 System board 79 Chapter 7 Notices and trademarks 81 ii M75s Gen 2 Hardware Maintenance Manual ...

Page 5: ... with the advanced diagnostic tests to troubleshoot problems 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 ...

Page 6: ...iv M75s Gen 2 Hardware Maintenance Manual ...

Page 7: ... Do not wear loose clothing that can be trapped in the moving parts of a machine Ensure that your sleeves are fastened or rolled up above your elbows If your hair is long fasten it Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip approximately 8 centimeters 3 inches from the end Do not wear jewelry chains metal frame eyeglasses or metal fasteners for ...

Page 8: ... position If you need to work on a machine that has exposed electrical circuits observe the following precautions Ensure that another person familiar with the power off controls is near you Remember Another person must be there to switch off the power if necessary Use only one hand when working with powered on electrical equipment keep the other hand in your pocket or behind your back Remember The...

Page 9: ...sider these conditions and the safety hazards they present Electrical hazards especially primary power primary voltage on the frame can cause serious or fatal electrical shock Explosive hazards such as a damaged CRT face or bulging capacitor Mechanical hazards such as loose or missing hardware The guide consists of a series of steps presented in a checklist Begin the checks with the power off and ...

Page 10: ...tive and retains a charge even when you are wearing a wrist strap Use the black side of a grounded work mat to provide a static free work surface The mat is especially useful when handling ESD sensitive devices Select a grounding system such as those listed below to provide protection that meets the specific service requirement Note The use of a grounding system is desirable but not required to pr...

Page 11: ...ct and disconnect cables as described in the following tables when installing moving or opening covers on this product or attached devices To Connect To Disconnect 1 Turn everything OFF 2 First attach all cables to devices 3 Attach signal cables to connectors 4 Attach power cords to outlet 5 Turn device ON 1 Turn everything OFF 2 First remove power cords from outlet 3 Remove signal cables from con...

Page 12: ...ducts contain an embedded Class 3A or Class 3B laser diode Note the following Laser radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposure to the beam 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb CAUTION Use safe practices when lifting CAUTION The power control button on the device and the power switch on the power supply do not turn off ...

Page 13: ...Chapter 1 Important safety information 7 ...

Page 14: ... 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb 1 2 8 M75s Gen 2 Hardware Maintenance Manual ...

Page 15: ... os cabos conforme descrito na tabela apresentada a seguir ao instalar mover ou abrir tampas deste produto ou de dispositivos conectados Para Conectar Para Desconectar 1 DESLIGUE Tudo 2 Primeiramente conecte todos os cabos aos dispositivos 3 Conecte os cabos de sinal aos conectores 4 Conecte os cabos de alimentação às tomadas 5 LIGUE os dispositivos 1 DESLIGUE Tudo 2 Primeiramente remova os cabos ...

Page 16: ...diodo de laser integrado da Classe 3A ou da Classe 3B Observe o seguinte Radiação a laser quando aberto Não olhe diretamente para o feixe a olho nu ou com instrumentos ópticos e evite exposição direta ao feixe 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb CUIDADO Utilize procedimentos de segurança para levantar equipamentos CUIDADO O botão de controle de alimentação do dispositivo e o botão para ligar ...

Page 17: ...Chapter 1 Important safety information 11 ...

Page 18: ...1 2 12 M75s Gen 2 Hardware Maintenance Manual ...

Page 19: ...Chapter 1 Important safety information 13 ...

Page 20: ...tilisez qu une seule main pour connecter ou déconnecter les câbles d interface Ne mettez jamais un équipement sous tension en cas d incendie ou d inondation ou en présence de dommages matériels Avant de retirer les carters de l unité mettez celle ci hors tension et déconnectez ses cordons d alimentation ainsi que les câbles qui la relient aux réseaux aux systèmes de télécommunication et aux modems...

Page 21: ...ropriée Ne pas la jeter à l eau l exposer à des températures supérieures à 100 C chercher à la réparer ou à la démonter Ne pas mettre la pile à la poubelle Pour la mise au rebut se reporter à la réglementation en vigueur ATTENTION Si des produits à laser tels que des unités de CD ROM de DVD ROM des unités à fibres optiques ou des émetteurs sont installés prenez connaissance des informations suivan...

Page 22: ...n anliegen Aus Sicherheitsgründen Bei Gewitter an diesem Gerät keine Kabel anschließen oder lösen Ferner keine Installations Wartungs oder Rekonfigurationsarbeiten durchführen Gerät nur an eine Schutzkontaktsteckdose mit ordnungsgemäß geerdetem Schutzkontakt anschließen Alle angeschlossenen Geräte ebenfalls an Schutzkontaktsteckdosen mit ordnungsgemäß geerdetem Schutzkontakt anschließen Die Signal...

Page 23: ...atterie nur durch eine Batterie mit der Teilenummer 45C1566 oder eine gleichwertige vom Hersteller empfohlene Batterie ersetzen Enthält das System ein Modul mit einer Lithiumbatterie dieses nur durch ein Modul desselben Typs und von demselben Hersteller ersetzen Die Batterie enthält Lithium und kann bei unsachgemäßer Verwendung Handhabung oder Entsorgung explodieren Die Batterie nicht mit Wasser i...

Page 24: ...eben der Maschine beachten ACHTUNG 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 1 2 18 M75s Gen 2 Hardware Maintenance Manual ...

Page 25: ...Chapter 1 Important safety information 19 ...

Page 26: ...ERICOLO La corrente elettrica proveniente dai cavi di alimentazione del telefono e di comunicazione può essere pericolosa Per evitare il rischio di scosse elettriche 20 M75s Gen 2 Hardware Maintenance Manual ...

Page 27: ...chiature 2 Innanzitutto collegare tutti i cavi alle unità 3 Collegare i cavi di segnale ai connettori 4 Collegare i cavi di alimentazione alla presa 5 Accendere l unità 1 SPEGNERE le apparecchiature 2 Innanzitutto rimuovere i cavi di alimentazione dalla presa 3 Rimuovere i cavi di segnale dai connettori 4 Rimuovere tutti i cavi dalle unità ATTENZIONE Quando si sostituisce la batteria al litio util...

Page 28: ...to segue Aprendo l unità vengono emesse radiazioni laser Non fissare il fascio non guardarlo direttamente con strumenti ottici ed evitare l esposizione al fascio 18 kg 32 kg 55 kg ATTENZIONE Prestare attenzione nel sollevare l apparecchiatura ATTENZIONE Il pulsante di controllo dell alimentazione presente sull unità e l interruttore dell alimentatore non disattivano l alimentazione corrente fornit...

Page 29: ...Chapter 1 Important safety information 23 ...

Page 30: ...ación 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 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...

Page 31: ...ispositivos PRECAUCIÓN Cuando sustituya una batería de litio utilice solamente una batería número de pieza 45C1566 u otra de tipo equivalente recomendada por el fabricante Si su sistema dispone de un módulo que contiene una batería de litio reemplácelo sólo con el mismo tipo de módulo del mismo fabricante La batería contiene litio y puede explotar si no se utiliza manipula o desecha correctamente ...

Page 32: ...dopte procedimientos seguros al levantar el equipo PRECAUCIÓN El botón de control de alimentación del dispositivo y el interruptor de alimentación de la fuente de alimentación no desconectan la corriente eléctrica suministrada al dispositivo 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...

Page 33: ... see if the symptoms change Replace only the FRU that changed the symptoms Strategy for replacing a hard disk drive or a solid state drive Always try to run a low level format operation before replacing a hard disk drive or a solid state drive This will cause all customer data on the drive to be lost Ensure that the customer has a current backup of the data before you perform this task Attention T...

Page 34: ...e default country code is WW example 20AACTO1WW Special bid model This model is a unique configuration that has been negotiated between Lenovo and the customer A unique MTM consists of a 4 character MT a 4 character model and a numeric 2 character country code is provided to the customer to place orders example 20AA000955 The country code assigned is numeric and does not designate a specific count...

Page 35: ...y indicator 3 SD card slot 4 Power button 5 Storage drive activity indicator 6 ThinkCentre LED 7 Microphone connector 8 Headset connector 9 USB C 3 2 Gen 1 connector 10 USB 3 2 connectors Gen 1 11 USB 3 2 connectors Gen 2 12 Internal speaker for selected models Copyright Lenovo 2020 29 ...

Page 36: ... HDMI out connector 4 USB 2 0 connectors 5 USB 2 0 connector with smart power on 6 Security lock slot 7 Serial connector 8 Ethernet connector 9 Padlock loop 10 E lock slots 11 PCI Express card area 12 Power cord connector 30 M75s Gen 2 Hardware Maintenance Manual ...

Page 37: ...in menu on the display If you did not receive the correct response proceed to step 6 on page 31 If you do receive the correct response proceed to step 7 on page 31 6 Look at the following conditions and follow the instructions If you hear beep codes during POST go to Beep symptoms on page 33 If the computer displays a POST error go to POST error codes on page 34 If the computer hangs and no error ...

Page 38: ...s The most likely cause is listed first Always begin with Symptom to FRU index on page 32 This index can also be used to help you decide which FRUs to have available when servicing a computer If you are unable to correct the problem using this index go to Undetermined problems on page 36 Notes The Symptom to FRU index is not specific to any machine type and are applicable to all computers If you h...

Page 39: ... without sound during POST The following table describes the beep symptoms Beep symptom FRU Action 2 short beeps common POST error Common POST error code See the detailed failure information in POST error codes on page 34 3 short and 1 long beeps DRAM memory error Perform the following actions in order 1 Make sure that the memory modules are properly seated in the memory slots 2 Replace the memory...

Page 40: ...ure ODD fan failure This error message is displayed when a fan fails and the system might be overheating Press F1 to enter Setup F2 to resume 0211 Keyboard not found This error message is displayed when no keyboard is detected 0164 Memory configuration change has occurred This error message is displayed when the memory configuration is changed Press F1 to enter Setup F2 to resume 1762 Storage devi...

Page 41: ...dministrator is using the correct MAC address 5 Ensure no interrupt or I O address conflicts 6 Network adapter advise network administrator of new MAC address Dead computer See Hard disk drive boot error on page 32 1 Power Supply 2 System Board Diskette drive in use light remains on or does not light when drive is active 1 Diskette Drive 2 System Board 3 Diskette Drive Cable Blank screen except fo...

Page 42: ...upply RPL computer cannot access programs from its own hard disk 1 If the network administrator is using LCCM Hybrid RPL check the startup sequence a 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 Serial or parallel connector device failure system board connector 1 External D...

Page 43: ...ry 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 System board on page 79 Chapter 4 Service checkout and symptom to FRU index 37 ...

Page 44: ...38 M75s Gen 2 Hardware Maintenance Manual ...

Page 45: ...rectly c All connected devices that require ac power are connected to properly grounded and working electrical outlets d All connected devices are enabled in UEFI BIOS 2 Use an antivirus program to see if the computer has been infected by a virus If the program detects a virus remove the virus 3 Go to Troubleshooting on page 39 and follow the instructions for the type of problem you are experienci...

Page 46: ...he correct storage drive or fails to start up Ensure that all storage drive signal cables and power cables are connected correctly Ensure that the storage drive the computer starts up from is listed as the first startup device in UEFI BIOS In rare cases the storage drive with the operating system might get corrupted or damaged In such cases you might need to replace the storage drive If the comput...

Page 47: ...ts the audio function built into the system board is disabled Therefore you must use the audio connectors on the audio adapter Ensure that the program you are running is designed for use in the Microsoft Windows operating system If the program is designed to run in DOS the program does not use the Windows sound feature The program must be configured to use SoundBlaster Pro or SoundBlaster emulatio...

Page 48: ...x mode might degrade performance cause data loss or result in lost connections When a Gigabit Ethernet model computer is used at a speed of 1000 Mbps the Ethernet LAN connection fails or errors occur Connect the network cable to the Ethernet connector using Category 5 wiring and a 100 BASE T hub switch not 100 BASE X The Wake On LAN WOL feature does not work Enable the Wake On LAN feature in UEFI ...

Page 49: ... then click Enable device 4 Expand Network adapters to display all network devices Right click each Bluetooth device and then click Enable device Turn on the Bluetooth radio 1 Open the Start menu 2 Click Settings Devices Bluetooth other devices 3 Turn on the Bluetooth switch to enable the Bluetooth feature Update or reinstall the Bluetooth driver Sound does not come from the Bluetooth headset or h...

Page 50: ... Start menu 2 Click Windows System File Explorer This PC 3 Right click your C drive and then click Properties 4 Check the amount of free space and then click Disk Cleanup 5 A list of unnecessary file categories is displayed Select the category you want to delete and then click OK Disable some Windows features or remove some unnecessary programs 1 Go to Control Panel and view by large icons or smal...

Page 51: ...ged Try inserting another disc that you know works If you have multiple CD or DVD drives installed or a combination of CD and DVD drives try inserting the disc into the other drive In some cases only one of the drives is connected to the audio subsystem A bootable recovery medium such as the Product Recovery CD cannot be used to start your computer Ensure that the CD or DVD drive is set as the top...

Page 52: ... the power cord to a grounded electrical outlet Turn on the serial device and keep the device online Install any programs supplied with the serial device Refer to the documentation that comes with the serial device for more information If you added one serial connector adapter ensure that the adapter is installed correctly USB device problems Problem Solution A USB device cannot be accessed Connec...

Page 53: ...ngs 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 o...

Page 54: ... System Restore Then follow the on screen instructions Restore your files from a backup Note If you use the File History tool to restore your files from a backup ensure that you backed up your data earlier with the tool 1 Go to Control Panel and view by large icons or small icons 2 Click File History Restore personal files Then follow the on screen instructions Reset your computer In the resetting...

Page 55: ...nected to ac power 2 Prepare a USB drive with capacity of at least 16 GB The actual USB capacity required depends on the size of the recovery image 3 Connect the prepared USB drive to the computer 4 Type recovery in the search box Then click Create a recovery drive 5 Click Yes in the User Account Control window to allow the Recovery Media Creator program to start 6 In the Recovery Drive window fol...

Page 56: ... com and select the entry for your computer Then follow the on screen instructions to download and install necessary drivers and software 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 2 Click Settings Update Security Windows Update 3 Follow the on screen instructio...

Page 57: ...ansion slot cover or other unpainted metal surface on the computer for at least two seconds This reduces static electricity from the package and your body before you install or replace a new part When possible remove the new part from the static protective package and install it directly in the computer without setting the part down When this is not possible place the static protective package on ...

Page 58: ...selves or by trained service technicians at an additional cost Optional service CRUs Refer to parts that can be installed or replaced by customers with a greater skill level Trained service technicians can also provide service to install or replace the parts under the type of warranty designated for the customer s machine FRUs Refer to parts that must be installed or replaced only by trained servi...

Page 59: ...tional service CRU 1 Heat sink and fan assembly No No 2 Memory module Yes No 3 Microprocessor No No 4 System board No No 5 Coin cell battery No Yes 6 Wi Fi card No No 7 Wi Fi card shield No No Chapter 6 Hardware removal and installation 53 ...

Page 60: ...ptical drive bracket Yes No 21 Optical drive Yes No 22 Optical drive cable No No 23 Front bezel Yes No 24 Vertical stand Yes No 25 Power cord Yes No 26 Mouse Yes No 27 Keyboard Yes No 28 Primary storage drive bracket Yes No 29 Primary storage drive Yes No 30 Secondary storage drive bracket Yes No 31 Secondary storage drive Yes No 32 Storage converter Yes No 33 Storage drive cable No No 34 Chassis ...

Page 61: ...ton connector 10 Internal speaker connector 11 10 pin power connector 12 SATA power connectors 13 Auxiliary fan connector 1 14 SATA 3 0 connectors 15 Buzzer 16 M 2 solid state drive slot 17 M 2 Wi Fi card slot 18 Thermal sensor connector 19 Illuminated red dot connector 20 Front USB connector 2 21 Front USB connector 1 22 LPC debug connector 23 Parallel connector 24 Serial COM2 connector 25 Clear ...

Page 62: ...anding the Chapter 1 Important safety information on page 1 Vertical stand 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 any media from the drives and turn off all connected devices and the computer 2 Disconnect all power cords from electrical outlets and disconnect all cables from the c...

Page 63: ... computer 3 Unlock any locking device that secures the computer cover 4 Remove the vertical stand See Vertical stand on page 56 5 Lay down the computer with the computer cover facing up Removal steps 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 on page 1 and print the following instructions F...

Page 64: ...apter 1 Important safety information on page 1 and print the following instructions For access do the following 1 Remove the computer cover See Computer cover on page 56 2 Disconnect the signal and power cable from the optical drive 58 M75s Gen 2 Hardware Maintenance Manual ...

Page 65: ...Replacement procedure Chapter 6 Hardware removal and installation 59 ...

Page 66: ...read Chapter 1 Important safety information on page 1 and print the following instructions For access remove the following parts in order Computer cover on page 56 Front bezel on page 57 Replacement procedure 60 M75s Gen 2 Hardware Maintenance Manual ...

Page 67: ... 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 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 Removal steps for 3 5 inch primary h...

Page 68: ...val steps for 2 5 inch primary hard disk drive Remove the storage converter with the 2 5 inch primary storage drive See 3 5 inch primary hard disk drive on page 61 62 M75s Gen 2 Hardware Maintenance Manual ...

Page 69: ...parts in order if any Computer cover on page 56 Front bezel on page 57 Optical drive on page 58 Drive bay assembly on page 60 2 On the bottom of the drive bay assembly disconnect the signal cable and the power cable from the 2 5 inch secondary hard disk drive Chapter 6 Hardware removal and installation 63 ...

Page 70: ...anges or replacement 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 Do not make the internal storage drive subject to physical shocks or vibration Put the internal storage drive o...

Page 71: ...olid state drive do one of the following depending on the computer model Type 1 Note Remove the film that covers the thermal pad if any when installing the M 2 solid state drive and the heat sink Type 2 Chapter 6 Hardware removal and installation 65 ...

Page 72: ...ermal pad if any when installing the M 2 solid state drive and the heat sink Type 3 Note Remove the film that covers the thermal pad if any when installing the M 2 solid state drive and the heat sink 66 M75s Gen 2 Hardware Maintenance Manual ...

Page 73: ...Front bezel on page 57 Drive bay assembly on page 60 M 2 solid state drive and heat sink on page 64 Replacement procedure Wi Fi card Prerequisite Before you start read Chapter 1 Important safety information on page 1 and print the following instructions For access remove the following parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 Chapter 6 Har...

Page 74: ...following parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 2 Disconnect the Wi Fi antenna cables from the Wi Fi card See Wi Fi card on page 67 Replacement procedure Rear Wi Fi antenna Prerequisite Before you start read Chapter 1 Important safety information on page 1 and print the following instructions 68 M75s Gen 2 Hardware Maintenance Manual ...

Page 75: ... 1 Important safety information on page 1 and print the following instructions Ensure that you follow the installation order for memory modules shown in the following illustration For access remove the following parts in order if any Chapter 6 Hardware removal and installation 69 ...

Page 76: ...mory module to the slot and press down on both ends until the latches are fully engaged with a click PCI Express card Prerequisite Before you start read Chapter 1 Important safety information on page 1 and print the following instructions For access remove the computer cover See Computer cover on page 56 Removal steps 70 M75s Gen 2 Hardware Maintenance Manual ...

Page 77: ... however no coin cell battery lasts forever If the coin cell battery fails the date and time information is lost An error message is displayed when you turn on the computer For access remove the computer cover See Computer cover on page 56 Removal steps Notes Reset the system date and time in the UEFI BIOS menu To dispose of the coin cell battery refer to the Lithium coin cell battery notice in th...

Page 78: ...ician For access do the following 1 Remove the following parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 2 Disconnect the power supply assembly cables from the system board Removal steps E lock Prerequisite Before you start read Chapter 1 Important safety information on page 1 and print the following instructions For access do the following 1 Re...

Page 79: ... 56 Front bezel on page 57 Drive bay assembly on page 60 2 Disconnect the internal speaker cable from the system board Removal steps Illuminated red dot cable 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 cover on page 56 Front bezel on page 5...

Page 80: ...nstructions For access do the following 1 Remove the following parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 2 Disconnect the thermal sensor cable from the system board Removal steps Front I O bracket and power button Prerequisite Before you start read Chapter 1 Important safety information on page 1 and print the following instructions 74 M75...

Page 81: ...parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 2 Disconnect the power button cable and the card reader cable from the system board Replacement procedure Chapter 6 Hardware removal and installation 75 ...

Page 82: ... following instructions For access do the following 1 Remove the following parts in order if any Computer cover on page 56 Front bezel on page 57 Drive bay assembly on page 60 Front I O bracket and power button on page 74 2 Disconnect the card reader cable from the system board Removal steps 76 M75s Gen 2 Hardware Maintenance Manual ...

Page 83: ...on page 1 and print the following instructions For access do the following 1 Remove the following parts in order if any Computer cover on page 56 Optical drive on page 58 2 Disconnect the microprocessor fan cable from the system board Replacement procedure Chapter 6 Hardware removal and installation 77 ...

Page 84: ... and wait several minutes until the computer is cool For access remove the following parts in order if any Computer cover on page 56 Optical drive on page 58 Heat sink and fan assembly on page 77 Notes Touch only the edges of the microprocessor Do not touch the gold contacts on the bottom Do not drop anything onto the microprocessor socket while it is exposed The socket pins must be kept as clean ...

Page 85: ... See Computer cover on page 56 2 Disconnect the cover presence switch cable from the system board Removal steps System board 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 cover on page 56 Front bezel on page 57 Chapter 6 Hardware removal and i...

Page 86: ...ard reader and card reader bracket on page 76 Heat sink and fan assembly on page 77 Microprocessor on page 78 2 Record the cable routing and cable connections and then disconnect all cables from the system board See System board on page 55 Notes Carefully handle the system board by its edges Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor Removal steps...

Page 87: ...your computer and the content of the manual at any time without additional notice The software interface and function and hardware configuration described in the manuals included with your computer might not match exactly the actual configuration of the computer that you purchase For the configuration of the product refer to the related contract if any or product packing list or consult the distri...

Page 88: ...notice For the latest information or any questions or comments contact or visit the Lenovo Web site https pcsupport lenovo com Trademarks LENOVO LENOVO logo THINKCENTRE and THINKCENTRE logo are trademarks of Lenovo Microsoft and Windows are trademarks of the Microsoft group of companies DisplayPort is a trademark of the Video Electronics Standards Association The terms HDMI and HDMI High Definitio...

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