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Heat sink and fan assembly

Prerequisite

Before you start, read 

Generic Safety and Compliance Notices

, and print the following instructions.

The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the 
computer and wait several minutes until the computer is cool.

For access, do the following:  

1.  Remove these parts in order, if any: 

•  “Computer cover” on page 49

•  “Optical drive” on page 50

•  “Front bezel” on page 51

•  “Optical drive cage” on page 55

2.  Disconnect the microprocessor fan cable from the system board.

Replacement procedure of 65-watt heat sink and fan assembly

1.  Follow the following sequence to loosen the four screws that secure the heat sink and fan assembly to 

the system board. Then, lift the heat sink and fan assembly off the system board. 

•  Partially loosen screw 

1a

, fully loosen screw 

1b

, and then fully loosen screw 

1a

.

•  Partially loosen screw 

1c

, fully loosen screw 

1d

, and then fully loosen screw 

1c

.

Notes: 

•  Carefully loosen the four screws to avoid any possible damage to the system board. The four screws 

cannot be removed from the heat sink and fan assembly.

•  You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.

•  Do not touch the thermal grease while handling the heat sink and fan assembly.

72

M90t Gen 3 Hardware Maintenance Manual

Summary of Contents for ThinkCentre M90t Gen 3

Page 1: ...M90t Gen 3 Hardware Maintenance Manual ...

Page 2: ...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 35F 05925 ...

Page 3: ...for resolving computer problems 39 UEFI diagnostic program 39 Lenovo diagnostic tools 40 The Vantage app 40 Self help resources 40 Chapter 6 Hardware removal and installation 43 Handling static sensitive devices 43 Service tool kit 43 Major FRUs and CRUs 44 System board 48 Removing and installing hardware 49 Computer cover 49 Optical drive 50 Front bezel 51 Primary hard disk drives 52 Optical driv...

Page 4: ...ii M90t Gen 3 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 M90t Gen 3 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 M90t Gen 3 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 M90t Gen 3 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 M90t Gen 3 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 M90t Gen 3 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: ...or 3 SD card slot 4 Power button 5 Power indicator 6 Storage drive activity indicator 7 ThinkCentre LED 8 Microphone connector 9 Headset connector 10 USB C 3 2 Gen 2 connector 11 USB 3 2 connectors Gen 1 12 USB 3 2 connectors Gen 2 13 Internal speaker for selected models Copyright Lenovo 2022 29 ...

Page 36: ... USB 3 2 connector Gen 1 with smart power on feature 7 Padlock loop 8 PS 2 mouse connector 9 PS 2 keyboard connector 10 Ethernet connector 11 E lock slots 12 Serial connector 13 Smart cable clip slots 14 PCI Express card area 15 Security lock slot 16 Power cord connector for selected models 30 M90t Gen 3 Hardware Maintenance Manual ...

Page 37: ...nu 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 is di...

Page 38: ...ses The most likely cause is listed first Always begin with Service checkout on page 31 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 hav...

Page 39: ...ity Power on switch Beep symptoms Beep symptoms are tones or a series of tones separated by pauses intervals 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 actio...

Page 40: ...a fan fails and the system might be overheating Press F1 to enter Setup F2 to resume 0162 Setup data integrity check failure This error indicates the checksum of BIOS Setup data in NVRAM is bad In BIOS Setup the Save Changes and Exit operation is needed in order to clear this error 0164 Memory configuration change has occurred This error message is displayed when the memory configuration is change...

Page 41: ...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 for flashing cursor 1 System Board 2 Primary Hard Disk Drive 3 Hard Disk Drive Cable Incorrect memory size during POST 1 Run the Memory tests 2 Memory Module 3 System Board Insert a Diskette icon appears with a known go...

Page 42: ...sk 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 Device Self Test OK 2 External Device 3 Cable 4 System Board Serial or parallel connector device failure adapter connector 1 External Device Self Test OK 2 External Device 3 Cable 4 Alternate Adapter 5 Syste...

Page 43: ...retest the system 4 Repeat steps 1 through 3 until you find the failing device or adapter If all devices and adapters have been removed and the problem continues replace the system board See Chapter 6 Hardware removal and installation on page 43 Chapter 4 Service checkout and symptom to FRU index 37 ...

Page 44: ...38 M90t Gen 3 Hardware Maintenance Manual ...

Page 45: ... and follow the instructions for the type of problem you are experiencing 4 Run the diagnostic program 5 Recover your operating system See Self help resources on page 40 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 re...

Page 46: ... is preinstalled on your computer To diagnose problems with the Vantage app 1 Type Vantage in the Windows search box and press Enter 2 Follow the on screen instructions and run a hardware scan 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 suppor...

Page 47: ...de and helpful articles Note The available features vary depending on the computer model Type Vantage in the Windows search box Product documentation Safety and Warranty Guide Generic Safety and Compliance Notices Setup Guide This User Guide Regulatory Notice Go to https pcsupport lenovo com Then follow the on screen instructions to filter out the documentation you want Lenovo Support Web site wit...

Page 48: ...42 M90t Gen 3 Hardware Maintenance Manual ...

Page 49: ...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 50: ...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 51: ...n Self service CRU Optional service CRU 1 Computer cover Yes No 2 Thumb screws No No 3 65 watt heat sink and fan assembly No No 4 125 watt heat sink and fan assembly No No Chapter 6 Hardware removal and installation 45 ...

Page 52: ...phics card holder Yes No 19 Optical drive bracket Yes No 20 Chassis beam No No 21 Storage drive converter Yes No 22 Optical drive cage Yes No 23 Front bezel Yes No 24 Power cord Yes No 25 Keyboard Yes No 26 Mouse Yes No 27 2 5 inch hard disk drive cage Yes No 28 2 5 inch hard disk drive bracket Yes No 29 2 5 inch hard disk drive Yes No 30 3 5 inch primary hard disk drive cage Yes No 31 3 5 inch ha...

Page 53: ...s 47 Graphics card fan Yes No 48 Memory module Yes No 49 Microprocessor No No 50 System board No No 51 Wi Fi card shield No No 52 Wi Fi card No No 53 VRM heat sink No No 54 Graphics cards Yes No 55 Flexible I O board No No for selected models For detailed FRU and CRU information such as the FRU part numbers and supported computer models go to http www lenovo com serviceparts lookup Chapter 6 Hardw...

Page 54: ...ATA power connectors 15 Clear CMOS Complementary Metal Oxide Semiconductor Recovery jumper 16 Auxiliary fan connector 2 17 SATA connectors 18 M 2 solid state drive slots 19 Thermal sensor connector 20 Front USB connector 2 21 M 2 Wi Fi card slot 22 Front USB connector 1 23 Parallel connector 24 Serial COM2 connector 25 Thunderbolt connector 26 PCI Express x1 card slot 27 PCI Express x16 Gen 4 card...

Page 55: ...uisite Before you start read Generic Safety and Compliance Notices and print the following instructions Before you open the computer cover turn off the computer and wait several minutes until the computer is cool For access do the following 1 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 ...

Page 56: ...ic Safety and Compliance Notices and print the following instructions For access do the following 1 Remove the Computer cover on page 49 2 Disconnect the signal and power cable from the optical drive Removal steps 50 M90t Gen 3 Hardware Maintenance Manual ...

Page 57: ...you start read Generic Safety and Compliance Notices and print the following instructions For access remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Chapter 6 Hardware removal and installation 51 ...

Page 58: ...n 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 Replace the internal storage drive only for upgrade or repair The internal storage drive is not designed for frequent changes or replacement 52 M90t Gen 3 Hardware Maintenance Manual ...

Page 59: ...cloth to absorb physical shocks Removal steps of the 3 5 inch primary hard disk drive and bracket 1 Remove the Computer cover on page 49 2 Disconnect the signal cable and the power cable from the 3 5 inch primary hard disk drive 3 Remove the 3 5 inch primary hard disk drive and bracket Removal steps of the 2 5 inch primary hard disk drive converter and bracket 1 Remove the Computer cover on page 4...

Page 60: ...54 M90t Gen 3 Hardware Maintenance Manual ...

Page 61: ...ns For access do the following 1 Remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 2 Disconnect the signal cable and power cable if any from the secondary hard disk drive under the optical drive cage Replacement procedure Chapter 6 Hardware removal and installation 55 ...

Page 62: ...hanges 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 ...

Page 63: ...Removal steps of the 2 5 inch secondary storage drive bracket and cage Chapter 6 Hardware removal and installation 57 ...

Page 64: ...propriate handling might cause damage and permanent loss of data When handling the internal storage drive observe the following guidelines Replace the internal storage drive only for upgrade or repair The internal storage drive is not designed for frequent changes or replacement Before replacing the internal storage drive make a backup copy of all the data that you want to keep Do not touch the co...

Page 65: ...s remove the Computer cover on page 49 Removal steps Remove the M 2 solid state drive and the heat sink if any depending on the computer model For computers without the heat sink for the M 2 solid state drive For computers with the heat sink for the M 2 solid state drive do one of the following depending on the computer model Type 1 Chapter 6 Hardware removal and installation 59 ...

Page 66: ...stalling the M 2 solid state drive and the heat sink M 2 solid state drive bracket Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove these parts in order if any 60 M90t Gen 3 Hardware Maintenance Manual ...

Page 67: ...print the following instructions For access do the following 1 Remove the Computer cover on page 49 2 Disconnect the PCI Express connector cable from the system board Removal steps PCI Express card Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove the Computer cover on page 49 Chapter 6 Hardware removal and installation ...

Page 68: ... PCI Express card remove any PCI Express connector cables that impede the installation See PCI Express connector cable on page 61 Graphics card fan Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove the Computer cover on page 49 Replacement procedure 62 M90t Gen 3 Hardware Maintenance Manual ...

Page 69: ...erequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove the Computer cover on page 49 Replacement procedure Chapter 6 Hardware removal and installation 63 ...

Page 70: ...ics card secured with a plastic holder and a bracket For access do the following 1 Remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Optical drive cage on page 55 Graphics card fan on page 62 Graphics card holder on page 63 2 Disconnect the power cable if any from the graphics card 64 M90t Gen 3 Hardware Maintenance Manual ...

Page 71: ...Chapter 6 Hardware removal and installation 65 ...

Page 72: ...red with a plastic holder For access do the following 1 Remove these parts in order if any Computer cover on page 49 Graphics card holder on page 63 2 Disconnect the power cable if any from the graphics card 66 M90t Gen 3 Hardware Maintenance Manual ...

Page 73: ...quisite Before you start read Generic Safety and Compliance Notices and print the following instructions Ensure that you follow the installation order for memory modules shown in the following illustration For access remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Chapter 6 Hardware removal and installation 67 ...

Page 74: ...llowing guidelines Replace the internal storage drive only for upgrade or repair The internal storage drive is not designed for frequent changes or replacement Before replacing the internal storage drive make a backup copy of all the data that you want to keep Do not touch the contact edge of the internal storage drive Otherwise the internal storage drive might get damaged Do not apply pressure to...

Page 75: ...If you suffer an injury seek medical care immediately Never remove the cover on a power supply or any part that has the following label attached Hazardous voltage current and energy levels are present inside any component that has this label attached There are no serviceable parts inside these components If you suspect a problem with one of these parts contact a service technician For access do th...

Page 76: ...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 If the coin cell battery fails the date and time information is lost An error message is displayed when you turn on the computer To dispose of the coin cell battery refer to the Lithium coin cell batte...

Page 77: ...re you start read Generic Safety and Compliance Notices and print the following instructions For access do the following 1 Remove the Computer cover on page 49 2 Disconnect the E lock cable from the system board Note To remove the screws you need a special tool T15 star wrench Removal steps Chapter 6 Hardware removal and installation 71 ...

Page 78: ...f 65 watt heat sink and fan assembly 1 Follow the following sequence to loosen the four screws that secure the heat sink and fan assembly to the system board Then lift the heat sink and fan assembly off the system board Partially loosen screw 1a fully loosen screw 1b and then fully loosen screw 1a Partially loosen screw 1c fully loosen screw 1d and then fully loosen screw 1c Notes Carefully loosen...

Page 79: ...Do not over tighten the screws Partially tighten screw 2a fully tighten screw 2b and then fully tighten screw 2a Partially tighten screw 2c fully tighten screw 2d and then fully tighten screw 2c Notes Apply appropriate amount of thermal grease to the new heat sink and fan assembly Ensure that the heat sink and fan assembly cable is toward the microprocessor fan connector on the system board Chapte...

Page 80: ...2a Partially loosen screw 2c fully loosen screw 2d and then fully loosen screw 2c Notes Carefully loosen the four screws to avoid any possible damage to the system board The four screws cannot be removed from the heat sink and fan assembly You might have to gently twist the heat sink and fan assembly to free it from the microprocessor Do not touch the thermal grease while handling the heat sink an...

Page 81: ...the chassis Partially tighten screw 2a fully tighten screw 2b and then fully tighten screw 2a Partially tighten screw 2c fully tighten screw 2d and then fully tighten screw 2c Notes Apply appropriate amount of thermal grease to the new heat sink and fan assembly Ensure that the heat sink and fan assembly cable is toward the microprocessor fan connector on the system board In case you need to insta...

Page 82: ...tions For access remove these FRUs in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Optical drive cage on page 55 Graphics card fan on page 62 Graphics card holder on page 63 Graphics card on page 64 125 watt heat sink and fan assembly 76 M90t Gen 3 Hardware Maintenance Manual ...

Page 83: ...Replacement procedure Chapter 6 Hardware removal and installation 77 ...

Page 84: ...lowing instructions For access do the following 1 Remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Optical drive cage on page 55 2 Disconnect the power button cable from the system board 3 Disconnect the card reader cable from the card reader 78 M90t Gen 3 Hardware Maintenance Manual ...

Page 85: ...Removal steps Chapter 6 Hardware removal and installation 79 ...

Page 86: ...any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Optical drive cage on page 55 2 Disconnect the internal speaker cable from the system board Removal steps Wi Fi card Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove Computer cover on page 49 80 M90t Gen 3 Hardware Maintenance Manual ...

Page 87: ...he connector labeled MAIN Front Wi Fi antenna Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Replacement procedure Chapter 6 Hardware removal and installation 81 ...

Page 88: ...a Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove Computer cover on page 49 Replacement procedure 82 M90t Gen 3 Hardware Maintenance Manual ...

Page 89: ...Front fan Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access do the following Chapter 6 Hardware removal and installation 83 ...

Page 90: ...l drive on page 50 Front bezel on page 51 2 Disconnect the front fan cable from the system board Removal steps Rear fan Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions 84 M90t Gen 3 Hardware Maintenance Manual ...

Page 91: ... rear fan cable from the system board Replacement procedure Flexible I O board Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions For access remove these parts in order if any Chapter 6 Hardware removal and installation 85 ...

Page 92: ... Safety and Compliance Notices and print the following instructions For access do the following 1 Remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Optical drive cage on page 55 2 Disconnect the ThinkCentre LED cable from the system board 86 M90t Gen 3 Hardware Maintenance Manual ...

Page 93: ...ce Notices and print the following instructions For access do the following 1 Remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 2 Disconnect the thermal sensor cable from the system board Chapter 6 Hardware removal and installation 87 ...

Page 94: ...Before you start read Generic Safety and Compliance Notices and print the following instructions For access do the following 1 Remove Computer cover on page 49 2 Disconnect the cover presence switch cable from the system board 88 M90t Gen 3 Hardware Maintenance Manual ...

Page 95: ...til the computer is cool For access remove these parts in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Optical drive cage on page 55 Heat sink and fan assembly on page 72 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 ...

Page 96: ...minutes until the computer is cool Notes Your microprocessor sockets and socket covers might look slightly different from the illustrations in this topic Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor For access do the following 1 Remove these FRUs in order if any Computer cover on page 49 Optical drive on page 50 Front bezel on page 51 Primary hard d...

Page 97: ... Memory module on page 67 Coin cell battery on page 70 E lock on page 71 Front I O bracket power button cable and card reader on page 78 Internal speaker on page 80 Wi Fi card on page 80 Front fan on page 83 Rear fan on page 84 Flexible I O board on page 85 Cover presence switch bracket and cable on page 88 Microprocessor on page 89 2 Record the cable routing and cable connections and then disconn...

Page 98: ...oprocessor socket cover might look slightly different from the illustration 3 Carefully check the four corners of the socket cover to ensure that the cover is seated securely 4 Follow any additional instructions that are included with the replacement part you received VRM heat sink Prerequisite Before you start read Generic Safety and Compliance Notices and print the following instructions The hea...

Page 99: ...e 71 Front I O bracket power button cable and card reader on page 78 Internal speaker on page 80 Wi Fi card on page 80 Front fan on page 83 Rear fan on page 84 Flexible I O board on page 85 Cover presence switch bracket and cable on page 88 Microprocessor on page 89 System board on page 90 2 Turn over the system board Replacement procedure Chapter 6 Hardware removal and installation 93 ...

Page 100: ...94 M90t Gen 3 Hardware Maintenance Manual ...

Page 101: ...ht to improve and or modify the products and software programs described in the manuals included with 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 configura...

Page 102: ...e 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 Intel and Thunderbolt are trademarks of Intel Corporation or its subsidiaries in the U S and or other countries Microsoft Windows and Cortana are tra...

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