Lenovo ThinkCentre M70s Gen 5 Enterprise Level Tower PC User Manual

Lenovo ThinkCentre M70s Gen 5 Enterprise Level Tower PC

Product Information

Specifications

• Model: M70s Gen 5, M90s Gen 5
• Edition: First Edition (March 2024)

Product Overview

The M70s Gen 5 and M90s Gen 5 are advanced hardware systems designed for efficient performance and reliability.

Important Safety Information

It is crucial to follow safety guidelines while handling the product to prevent accidents or injuries. Some key safety points include:

• Ensuring secure footing when lifting or moving the product
• Proper weight distribution during handling
• Using slow and controlled lifting forces
• Avoiding sudden movements or twisting while lifting
• Avoiding contact with hot components to prevent burns

Hardware Maintenance

The hardware maintenance manual provides detailed instructions on servicing and maintaining the product. It includes information on safety precautions, service procedures, and diagnostic tools.

Product Usage Instructions

1. Safety Precautions

Before interacting with the product, ensure that all power sources are disconnected and the components have cooled down to avoid injury.

2. Service and Maintenance

Refer to the hardware maintenance manual for guidance on replacing components, handling static-sensitive devices, and using diagnostic programs.

3. Troubleshooting

If you encounter issues with the product, utilize diagnostic tools and follow the symptom-to-FRU index in the manual for problem resolution.

4. Hardware Removal and Installation

When removing or installing hardware components, use proper tools and techniques to prevent damage to the product. Pay attention to static-sensitive devices and connectors.

FAQs

• Q: What should I do if I encounter a hard disk drive boot error?
  • A: Refer to the Symptom-to-FRU index in Chapter 4 of the manual for troubleshooting steps related to hard disk drive boot errors.
• Q: How can I use the UEFI diagnostic program?
  • A: Detailed instructions on utilizing the UEFI diagnostic program can be found in Chapter 5 of the hardware maintenance manual.

About this manual
This manual provides service and reference information for ThinkCentre® computers listed on the front cover. Illustrations in this manual might look different from your product. Use this manual along 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

© Copyright Lenovo 2024

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Chapter 1.

Important safety information

General safety
Follow these rules to ensure general safety: · Observe good housekeeping in the area of the machines during and after maintenance. · When lifting any heavy object:
1. Ensure you can stand safely without slipping. 2. Distribute the weight of the object equally between your feet. 3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift. 4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the
muscles in your back.
Attention: Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you. · Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe. · Before you start the machine, ensure that other service representatives and the customer’s personnel are not in a hazardous position. · Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine. · Keep your tool case away from walk areas so that other people will not trip over it. · 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 your clothing. Remember: Metal objects are good electrical conductors. · Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes. · After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective. · Reinstall all covers correctly before returning the machine to the customer.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.
CAUTION:
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 2024

1

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.
Observe the following rules when working on electrical equipment.
Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.
· Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.
· Do not work alone under hazardous conditions or near equipment that has hazardous voltages. · Disconnect all power before:
­ Performing a mechanical inspection ­ Working near power supplies ­ Removing or installing Field Replaceable Units (FRUs) · Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine and to lock the wall box in the off 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: There must be a complete circuit to cause electrical shock. By observing the above rule, you may prevent a current from passing through your body.
­ When using a tester, set the controls correctly and use the approved probe leads and accessories for that tester.
­ Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.
Observe the special safety precautions when you work with very high voltages; these instructions are in the safety sections of maintenance information. Use extreme care when measuring high voltages. · Regularly inspect and maintain your electrical hand tools for safe operational condition. · Do not use worn or broken tools and testers. · Never assume that power has been disconnected from a circuit. First, check that it has been powered-off. · Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, nongrounded power extension cables, power surges, and missing safety grounds. · Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage. · Do not service the following parts with the power on when they are removed from their normal operating places in a machine:
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­ Power supply units ­ Pumps ­ Blowers and fans ­ Motor generators and similar units. (This practice ensures correct grounding of the units.) · If an electrical accident occurs: ­ Use caution; do not become a victim yourself. ­ Switch off power. ­ Send another person to get medical aid.
Safety inspection guide
The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these products. Each machine, as it was designed and built, had required safety items installed to protect users and service personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide.
If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.
Consider 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 the power cord disconnected.
Checklist: 1. Check exterior covers for damage (loose, broken, or sharp edges). 2. Power-off the computer. Disconnect the power cord. 3. Check the power cord for: a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and frame ground. b. The power cord should be the appropriate type as specified in the parts listings. c. Insulation must not be frayed or worn. 4. Remove the cover. 5. Check for any obvious alterations. Use good judgment as to the safety of any alterations. 6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage. 7. Check for worn, frayed, or pinched cables. 8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.
Chapter 1. Important safety information 3

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.
Notes: 1. Use product-specific ESD procedures when they exceed the requirements noted here. 2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.
When handling ESD-sensitive parts: · Keep the parts in protective packages until they are inserted into the product. · Avoid contact with other people while handling the part. · Wear a grounded wrist strap against your skin to eliminate static on your body. · Prevent the part from touching your clothing. Most clothing is insulative 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 protect against ESD damage. ­ Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground. ­ Use an ESD common ground or reference point when working on a double-insulated or battery-
operated system. You can use coax or connector-outside shells on these systems. ­ Use the round ground-prong of the ac plug on ac-operated computers.
Grounding requirements
Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.
Safety notices (multi-lingual translations)
The caution and danger safety notices in this section are provided in the following languages: · English · Arabic · Brazilian/Portuguese · Chinese (simplified) · Chinese (traditional) · French · German · Hebrew · Italian · Korean
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· Spanish

DANGER
Electrical current from power, telephone and communication cables is hazardous.
To avoid a shock hazard:
· Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
· Connect all power cords to a properly wired and grounded electrical outlet. · Connect to properly wired outlets any equipment that will be attached to this product. · When possible, use one hand only to connect or disconnect signal cables. · Never turn on any equipment when there is evidence of fire, water, or structural damage. · Disconnect the attached power cords, telecommunications systems, networks, and modems
before you open the device covers, unless instructed otherwise in the installation and configuration procedures. · Connect and disconnect cables as described in the following tables when installing, moving, or opening covers on this product or attached devices.

To Connect
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.

To Disconnect
1. Turn everything OFF. 2. First, remove power cords from outlet. 3. Remove signal cables from connectors. 4. Remove all cables from devices.

CAUTION: When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made by the same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of. Do not: · Throw or immerse into water · Heat to more than 100°C (212°F) · Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.

CAUTION:

Chapter 1. Important safety information 5

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. · Use of controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.
DANGER
Some laser products 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) CAUTION: Use safe practices when lifting.

32 kg (70.5 lb)

55 kg (121.2 lb)

CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

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Chapter 1. Important safety information 7

18 kg (37 lb)

32 kg (70.5 lb)

55 kg (121.2 lb)

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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.
· Conecte todos os cabos de alimentação a tomadas elétricas corretamente instaladas e aterradas. · Todo equipamento que for conectado a este produto deve ser conectado a tomadas corretamente
instaladas. · Quando possível, utilize apenas uma das mãos para conectar ou desconectar cabos de sinal. · Nunca ligue nenhum equipamento quando houver evidência de fogo, água ou danos estruturais. · Antes de abrir tampas de dispositivos, desconecte cabos de alimentação, sistemas de telecomunicação,
redes e modems conectados, a menos que especificado de maneira diferente nos procedimentos de instalação e configuração. · Conecte e desconecte os cabos conforme descrito na tabela apresentada a seguir ao instalar, mover ou abrir tampas deste produto ou de dispositivos conectados.

Para Conectar:
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.

Para Desconectar:
1. DESLIGUE Tudo. 2. Primeiramente, remova os cabos de alimentação das
tomadas. 3. Remova os cabos de sinal dos conectores. 4. Remova todos os cabos dos dispositivos.

CUIDADO:
Ao substituir a bateria de lítio, utilize apenas uma bateria com Número de Peça 45C1566 ou um tipo de bateria equivalente recomendado pelo Se o seu sistema possui um módulo com uma bateria de lítio, substitua-o apenas por um módulo do mesmo tipo e do mesmo fabricante. A bateria contém lítio e pode explodir se não for utilizada, manuseada ou descartada de maneira correta.
Não: · Jogue ou coloque na água · Aqueça a mais de 100°C (212°F) · Conserte nem desmonte
Descarte a bateria conforme requerido pelas leis ou regulamentos locais.

Chapter 1. Important safety information 9

PRECAUCIÓN:
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 radiação de laser. Não existem peças que podem ser consertadas no interior do dispositivo. · A utilização de controles ou ajustes ou a execução de procedimentos diferentes dos especificados aqui
pode resultar em exposição prejudicial à radiação.
PERIGO
Alguns produtos a laser contêm 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/desligar da fonte de alimentação não desligam a corrente elétrica fornecida ao dispositivo. O dispositivo também pode ter mais de um cabo de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que todos os cabos de alimentação estejam desconectados da fonte de alimentação.
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Chapter 1. Important safety information 11

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Chapter 1. Important safety information 13

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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. · Branchez tous les cordons d’alimentation sur un socle de prise de courant correctement câblé et mis à la
terre. · Branchez sur des socles de prise de courant correctement câblés tout équipement connecté à ce produit. · Lorsque cela est possible, n’utilisez 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 (sauf instruction contraire mentionnée dans les procédures d’installation et de configuration). · Lorsque vous installez, que vous déplacez, ou que vous manipulez le présent produit ou des périphériques qui lui sont raccordés, reportez-vous aux instructions ci- dessous pour connecter et déconnecter les différents cordons.
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Connexion

Déconnexion

1. Mettez les unités HORS TENSION.
2. Commencez par brancher tous les cordons sur les unités.
3. Branchez les câbles d’interface sur des connecteurs.
4. Branchez les cordons d’alimentation sur des prises.
5. Mettez les unités SOUS TENSION.

1. Mettez les unités HORS TENSION. 2. Débranchez les cordons d’alimentation des prises. 3. Débranchez les câbles d’interface des connecteurs. 4. Débranchez tous les câbles des unités.

ATTENTION: Remplacer la pile au lithium usagée par une pile de référence identique exclusivement, (référence 45C1566), ou suivre les instructions du fabricant qui en définit les équivalences. Si votre système est doté d’un module contenant une pile au lithium, vous devez le remplacer uniquement par un module identique, produit par le même fabricant. La pile contient du lithium et peut exploser en cas de mauvaise utilisation, de mauvaise manipulation ou de mise au rebut inappropriée. 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 suivantes : · Ne retirez pas le carter. En ouvrant l’unité de CD-ROM ou de DVD-ROM, vous vous exposez au
rayonnement dangereux du laser. Aucune pièce de l’unité n’est réparable. · Pour éviter tout risque d’exposition au rayon laser, respectez les consignes de réglage et
d’utilisation des commandes, ainsi que les procédures décrites dans le présent manuel.
DANGER Certains produits à laser contiennent une diode à laser intégrée de classe 3A ou 3B. Prenez connaissance des informations suivantes: Rayonnement laser lorsque le carter est ouvert. Evitez toute expositiondirecte au rayon laser. Evitez de regarder fixement le faisceau ou del’observer à l’aide d’instruments optiques.
Chapter 1. Important safety information 15

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. Pour mettre l’unité hors tension, vous devez déconnectertous les cordons de la source d’alimentation.
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VORSICHT
An Netz-, Telefon- und Datenleitungen können gefährliche Spannungen 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 Signalkabel nach Möglichkeit einhändig anschließen oder lösen, um einen Stromschlag durch
Berühren von Oberflächen mit unterschiedlichem elektrischem Potenzial zu vermeiden.
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· Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen.
· Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken und Modems ist vor dem Öffnen des Gehäuses zu unterbrechen, sofern in den Installations- und Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind.
· Zum Installieren, Transportieren und Öffnen der Abdeckungen des Computers oder der angeschlossenen Einheiten die Kabel gemäß der folgenden Tabelle anschließen und abziehen.

Zum Anschließen der Kabel gehen Sie wie folgt vor
1. Schalten Sie alle Einheiten AUS. 2. Schließen Sie erst alle Kabel an die Einheiten an. 3. Schließen Sie die Signalkabel an die Buchsen an. 4. Schließen Sie die Netzkabel an die Steckdose an. 5. Schalten Sie die Einheit EIN.

Zum Abziehen der Kabel gehen Sie wie folgt vor
1. Schalten Sie alle Einheiten AUS. 2. Ziehen Sie zuerst alle Netzkabel aus den
Netzsteckdosen. 3. Ziehen Sie die Signalkabel aus den Buchsen. 4. Ziehen Sie alle Kabel von den Einheiten ab.

CAUTION:
Eine verbrauchte Lithiumbatterie 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 in Berührung bringen. · über 100 C erhitzen. · reparieren oder zerlegen.
Die örtlichen Bestimmungen für die Entsorgung von Sondermüll beachten.

ACHTUNG:
Bei der Installation von Lasergeräten (wie CD-ROM-Laufwerken, DVD- aufwerken, Einheiten mit Lichtwellenleitertechnik oder Sendern) Folgendes beachten:
· Die Abdeckungen nicht entfernen. Durch Entfernen der Abdeckungen des Lasergeräts können gefährliche Laserstrahlungen freigesetzt werden. Das Gerät enthält keine zu wartenden Teile.
· Werden Steuerelemente, Einstellungen oder Durchführungen von Prozeduren anders als hier angegeben verwendet, kann gefährliche Laserstrahlung auftreten.

VORSICHT

Chapter 1. Important safety information 17

Einige Lasergeräte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes:
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. 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.
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Chapter 1. Important safety information 19

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PERICOLO La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere pericolosa.
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Per evitare il rischio di scosse elettriche:
· Non collegare o scollegare qualsiasi cavo oppure effettuare l’installazione, la manutenzione o la riconfigurazione del prodotto durante un temporale.
· Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a terra.
· Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per questo prodotto.
· Se possibile, utilizzare solo una mano per collegare o scollegare i cavi di segnale.
· Non accendere assolutamente apparecchiature in presenza di incendi, perdite d’acqua o danno strutturale.
· Scollegare i cavi di alimentazione, i sistemi di telecomunicazione, le reti e il modem prima di aprire i coperchi del dispositivo, salvo istruzioni contrarie relative alle procedure di installazione e configurazione.
· Collegare e scollegare i cavi come descritto nella seguente tabella quando vengono effettuate operazioni di installazione, spostamento o apertura dei coperchi di questo prodotto o delle unità collegate.

Per collegarsi
1. SPEGNERE le apparecchiature. 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.

Per scollegarsi
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, utilizzare solo il Numero parte 45C1566 o un tipo di batteria equivalente consigliato dal produttore. Se sul sistema è presente un modulo che contiene una batteria al litio, sostituirlo solo con un tipo di modulo dello stesso tipo della stessa casa di produzione. La batteria contiene litio e può esplodere se usata, maneggiata o smaltita in modo non corretto.
Non: · Gettare o immergere la batteria nell’acqua · Riscaldarla ad una temperatura superiore ai 100 gradi C (212 gradi F) · Smontarla, ricaricarla o tentare di ripararla
Le batterie usate vanno smaltite in accordo alla normativa in vigore (DPR 915/82 e successive disposizioni e disposizioni locali).

ATTENZIONE:

Chapter 1. Important safety information 21

Quando vengono installati prodotti laser (quali CD-ROM, unità DVD-ROM, unità a fibre ottiche o trasmittenti), tener presente quanto segue: · 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.
PERICOLO Alcune unità laser contengono un diodo laser di Classe 3A o Classe 3B. Tener presente quanto 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

ATTENZIONE: Prestare attenzione nel sollevare l’apparecchiatura.

55 kg

ATTENZIONE: Il pulsante di controllo dell’alimentazione presente sull’unità e l’interruttore dell’alimentatore non disattivano l’alimentazione corrente fornita all’unità. E’ possibile che l’unità disponga di più cavi di alimentazione. Per disattivare l’alimentazione dall’unità, accertarsi che tutti i cavi di alimentazione siano scollegati dalla fonte di alimentazione.
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22 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Chapter 1. Important safety information 23

2 1
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. · Conecte todos los cables de alimentación a tomas de corriente debidamente cableadas y
conectadas a tierra.
24 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

· Cualquier equipo que se conecte a este producto también debe conectarse a tomas de corriente debidamente cableadas.
· Siempre que sea posible, utilice una sola mano para conectar o desconectar los cables de señal.
· No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales.
· 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.
· Conecte y desconecte los cables, como se describe en la tabla siguiente, cuando instale, mueva o abra las cubiertas de este producto o de los dispositivos conectados.

Para conectar
1. APÁGUELO todo. 2. En primer lugar, conecte todos los cables a los
dispositivos. 3. Conecte los cables de señal a los conectores. 4. Enchufe los cables de alimentación a las tomas de
corriente. 5. Encienda el dispositivo.

Para desconectar
1. APÁGUELO todo. 2. En primer lugar, desenchufe los cables de
alimentación de las tomas de corriente. 3. Desconecte los cables de señal de los conectores. 4. Desconecte todos los cables de los dispositivos.

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.
No debe: · Arrojarla al agua o sumergirla en ella · Exponerla a temperaturas superiores a 100°C (212°F) · Repararla o desmontarla Deshágase de la batería según especifiquen las leyes o normas locales.
PRECAUCIÓN: Cuando haya productos láser (como unidades de CD-ROM, unidades de DVD, dispositivos de fibra óptica o transmisores) instalados, tenga en cuenta lo siguiente: · No quite las cubiertas. Si quita las cubiertas del producto láser, podría quedar expuesto a radiación
láser peligrosa. Dentro del dispositivo no existe ninguna pieza que requiera servicio técnico. · Si usa controles o ajustes o realiza procedimientos que no sean los especificados aquí, podría
exponerse a radiaciones peligrosas.
Chapter 1. Important safety information 25

PELIGRO
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

PRECAUCIÓN: Adopte procedimientos seguros al levantar el equipo.

55 kg

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 de alimentación estén desconectados de la toma de corriente.
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26 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Chapter 2.

Important service information

Strategy for replacing FRUs
Before replacing parts: Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace any FRUs listed in this manual.
After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before you complete the service action.
To download and install software fixes, drivers, and UEFI BIOS, go to https://pcsupport.lenovo.com and follow the instructions on the screen.
Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs: · If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the
original FRU before you continue. · Some computers have both a processor board and a system board. If you are instructed to replace either
the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one. · If an adapter or a device consists of more than one FRU, any of the FRUs might be the cause of the error. Before replacing the adapter or device, remove the FRUs, one by one, to 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: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.
Important notice for replacing a system board
Some components mounted on a system board are very sensitive. Improper handling of a system board can cause damage to those components, and may cause a system malfunction.
After replacing the system board, use the Golden Key U1 tool to bind the model type, serial number, and Brand ID of the computer with the new system board. Refer to https://support.lenovo.com/us/en/solutions/ ht507251 for instructions.
Attention: When handling a system board: · Do not drop a system board or apply any excessive force to it. · Avoid rough handling of any kind. · Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA)
chipset.

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How to use error codes
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 codes. If no error code is displayed, see whether the error symptom is listed in the “Symptom-to-FRU Index” section.
Strategy for replacing FRUs for CTO, special-bid, and standard models
This topic provides information about the model types and FRU identification.
Product definition
This topic introduces different model types and how to identify each type. 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. The model is “CTO1” and the 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 country or region. The custom model factsheet for the MTM indicates which country the special-bid MTM is set up for. Special-bid offering is not generally announced. Standard model Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country code. The country code assigned is alphabetic and represents a designated country or region (example: 20AA0009UK).
FRU identification
To identify FRUs for a product, do the following: 1. Go to: https://support.lenovo.com/partslookup. 2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for more detailed FRU information.
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Chapter 3.

Product overview

Front
M70s Gen 5

Item 1 3 5 7 9 11

Description Optical drive eject button SD-card slot Storage drive activity indicator* Microphone connector USB-C® connector (USB 5Gbps) Internal speaker

Item 2 4 6 8 10

Description Optical drive activity indicator* Power button and power indicator ThinkCentre® LED Headset connector USB-A connectors (USB 5Gbps)

• for selected models
  Statement on USB transfer rate
  Depending on many factors such as the processing capability of the host and peripheral devices, file attributes, and other factors related to system configuration and operating environments, the actual transfer rate using the various USB connectors on this device will vary and will be slower than the data rate listed in the connector name or below for each corresponding device.

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29

USB device ThunderboltTM 3 Thunderbolt 4
M90s Gen 5

Data rate (Gbit/s) 40 40

Item 1 3 5 7 9 11

Description Optical drive eject button SD-card slot Storage drive activity indicator* Microphone connector USB-C connector (USB 10Gbps) USB-A connectors (USB 10Gbps)

• for selected models
  Power indicator Show the system status of your computer. · On: The computer is starting up or working. · Off: The computer is off or in hibernation mode. · Blinking: The computer is in sleep mode.

Item 2 4 6 8 10 12

Description Optical drive activity indicator* Power button and power indicator ThinkCentre LED Headset connector USB-A connectors (USB 5Gbps) Internal speaker

30 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Headset connector The headset connector is compatible with: · Headphones or earphones with a 3.5mm (0.14 inch), TRS (3-pole) plug · Headsets with a 3.5mm (0.14 inch), CTIA-compliant TRRS (4-pole) plug Note: This headset connector does not support standalone external microphones with a TRS (3-pole) plug or headsets with an OMTP-compliant TRRS (4-pole) plug.
Rear
M70s Gen 5

Item 1
3
5 7 9 11

Description DisplayPortTM out connector
USB-A connectors (Hi-Speed USB)
Security-lock slot PS/2 keyboard connector* Padlock loop PCI-Express card area

• for selected models

Item 2
4
6 8 10 12

Description HDMITM out connector USB-A connector (Hi-Speed USB) (with smart power-on) PS/2 mouse connector* Ethernet connector E-lock slots Power cord connector

Chapter 3. Product overview 31

M90s Gen 5

Item 1 3
5
7 9 11 13

Description Audio line-out connector HDMI out connector
USB-A connectors (USB 5Gbps)
Security-lock slot PS/2 keyboard connector* Padlock loop PCI-Express card area

Item 2 4
6
8 10 12 14

Description Optional connector DisplayPort out connectors USB-A connector (USB 5Gbps) (with smart power-on) PS/2 mouse connector Ethernet connector E-lock slots Power cord connector

• for selected models
  Optional connector Depending on the computer model, the connector might be a DisplayPort out connector, a USB-C connector (USB 5Gbps), a VGA out connector, or an HDMI out connector.

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Chapter 4.

Service checkout and symptom-to-FRU index

This chapter provides information about general service checkout and symptom- to-FRU index.
Service checkout
Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.
General error messages appear if a problem or conflict is found by a program, the operating system, or both. For an explanation of these messages, refer to the information supplied with that software package.
Use the following procedure to help determine the cause of the problem: 1. Turn off the computer and all external devices. 2. Check all cables and power cords. 3. Set all display controls to the middle position. 4. Turn on all external devices. 5. Turn on the computer. · Look for displayed error codes. · Listen for beep codes. · Look for readable instructions or a main menu on the display. If you did not receive the correct response, proceed to step 6 on page 33. If you do receive the correct response, proceed to step 7 on page 33. 6. Look at the following conditions and follow the instructions: · If you hear beep codes during POST, go to “Beep symptoms” on page 35. · If the computer displays a POST error, go to “POST error codes” on page 36. · If the computer hangs and no error is displayed, continue at step 7 on page 33. 7. Run the Diagnostic programs. See Chapter 5 “Diagnostics” on page 41. · If you receive an error, replace the part that the diagnostic program calls out. · If the test stops and you cannot continue, replace the last device tested.
Problem determination tips
Due to the variety of hardware and software combinations that can be encountered, use the following information to assist you in problem determination. If possible, have this information available when requesting assistance from Service Support and Engineering functions. · 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?

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­ 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 ­ BIOS level · Operating system software ­ Type and version level
Notes: To eliminate confusion, identical systems are considered identical only if they: 1. Are the exact machine type and models 2. Have the same BIOS level 3. Have the same adapters/attachments in the same locations 4. Have the same address jumpers/terminators/cabling 5. Have the same software versions and levels 6. Have the same Diagnostic Diskettes (version) 7. Have the same configuration options set in the system 8. Have the same setup for the operating system control files
Comparing the configuration and software set-up between “working and non- working” systems will often lead to problem resolution.

Symptom-to-FRU index
The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with “Service checkout” on page 33. 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 39.
Notes:
· The Symptom-to-FRU index is not specific to any machine type and are applicable to all computers. · If you have both an error message and an incorrect audio response, diagnose the error message first. · If you cannot run the diagnostic tests or you get a diagnostic error code when running a test, but did
receive a POST error message, diagnose the POST error message first. · If you did not receive any error message, look for a description of your error symptoms in the first part of
this index.
Hard disk drive boot error
A hard disk drive boot error can have the following causes.

Error
The start-up drive is not in the boot sequence in configuration.
No operating system installed on the boot drive.

FRU/Action
Check the configuration and ensure that the start-up drive is in the boot sequence.
Install an operating system on the boot drive.

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Error The boot sector on the startup drive is corrupted.
The drive is defective.

FRU/Action
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.
Replace the hard disk drive.

Power supply problems
If you suspect a power problem, use the following procedures.

Check/Verify
Check the following for proper installation. · Power cord · On/Off switch connector · On/Off switch power supply connector · System board power supply connectors · Microprocessor connection
Check the power cord for continuity.
Check the power-on switch for continuity.

FRU/Action Reseat connectors
Power cord 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 2 short beeps: common POST error 3 short and 1 long beeps: DRAM memory error
4 long beeps: insufficient shadow RAM resources for option ROM (error code: 8998) or PCIe/PCI MMIO (memory mappedinput/output) resources (error code: 8999) 2 long and 3 short beeps: graphics card error

FRU/Action Common POST error code. See the detailed failure information in “POST error codes” on page 36.
Perform the following actions in order: 1. Make sure that the memory modules are properly seated in the memory slots. 2. Replace the memory modules. 3. Replace the system board (for trained service personnel only).
See the detailed failure information in “POST error codes” on page 36.
Perform the following actions in order: 1. Make sure that the graphics cards are properly seated in the slots. 2. Replace the graphics cards. 3. Replace the system board (for trained service personnel only).

Chapter 4. Service checkout and symptom-to-FRU index 35

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:
· Some basic system-board operations · Memory operation · Video operation · Whether the boot drive is working
If the POST detects a problem, an error message appears on the screen. A single problem might cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time.

Error code 0135
0162
0164 1762

POST error message CPU fan failure System fan failure Power fan failure Front fan failure Rear fan failure Auxiliary fan failure ODD fan failure Setup data integrity check failure
Memory configuration change has occurred
Storage device configuration change has occurred

Description/Action
This error message is displayed when a fan fails and the system might be overheating. Press F10 to exit.
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.
This error message is displayed when the memory size is changed. Press F10 to exit.
This error message is displayed when a hard disk drive change or an optical drive change has been made. Press F10 to exit.

36 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Error code 8998
8999

POST error message Not enough shadow RAM resources for OPTION ROM, not all devices initialized. Suggest to remove some add-on cards, or change to UEFI mode in BIOS setup.
Not enough PCIe/PCI MMIO resources. Currently only one video card is enabled. Remove some PCIe cards.

Description/Action
This error message is displayed when the shadow RAM resources for option ROM are insufficient.
If the legacy option ROM is insufficient, remove some add-in cards.
For the system that supports UEFI, set UEFI as the first priority.
This error message is displayed when the PCIe/PCI MMIO (memory mapped input/output) resources are insufficient.
Remove some add-in cards.

Miscellaneous error conditions

Message/Symptom Changing display colors

FRU/Action Display/Monitor

Computer will not power-off. See “Hard disk drive boot error” on page 34.
Computer will not RPL from server

1. Power Switch 2. System Board 3. Riser card, if installed.
1. Ensure that the network is in startup sequence as the first device or the first device after diskette.
2. Ensure that the network adapter is enabled for RPL. 3. Network adapter (Advise network administrator of
new MAC address)

Computer will not perform a Wake On LAN® (if applicable)

1. Check the power supply and signal cable connections to the network adapter.
2. Ensure that the operating system settings are set to enable Wake on LAN.
3. Ensure that the Wake On LAN feature is enabled in Setup/Configuration.
4. Ensure that the network administrator 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 34.

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

Chapter 4. Service checkout and symptom-to-FRU index 37

Message/Symptom

FRU/Action

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-good diagnostics diskette in the first 3.5-inch diskette drive.

1. System Board 2. Diskette Drive Cable 3. Network Adapter

Intensity or color varies from left to right of characters and color bars

1. Display 2. Video adapter (if present) 3. System Board

No power or fan not running

1. See “Hard disk drive boot error” on page 34.

Non-system disk or disk error-type message with a known-good diagnostic diskette.

1. Diskette Drive 2. System Board 3. Diskette Drive Cable

Other display symptoms not listed above (including blank or illegible display)

1. Display 2. System Board

Power-on indicator or hard disk drive in-use light not on, but computer works correctly

1. Power switch/LED assembly 2. System Board

Printer problems

1. Printer 2. System Board

Program loads from the hard disk with a known-good diagnostics diskette in the first 3.5-inch diskette drive

1. Run the Setup Utility program and check the Startup sequence.
2. Diskette Drive 3. Diskette Drive Cable 4. System Board 5. Power Supply

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.

38 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Message/Symptom Serial or parallel connector device failure (system board connector)
Serial or parallel connector device failure (adapter connector)
Some or all keys on the keyboard do not work

FRU/Action
1. External Device Self-Test OK? 2. External Device 3. Cable 4. System Board
1. External Device Self-Test OK? 2. External Device 3. Cable 4. Alternate Adapter 5. System Board
1. Keyboard 2. Keyboard Cable 3. System Board

Undetermined problems
This section provides instructions on how to find out the failing devices or adapters. 1. Turn off the computer. 2. Remove or disconnect the following components (if installed) one at a time. a. External devices (modem, printer, or mouse) b. Any adapters c. Memory modules d. Extended video memory 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 Chapter 6 “Hardware removal and installation” on page 45.
Recover from a BIOS update failure
1. Remove all media from the drives and turn off all connected devices. 2. Insert the BIOS update disc into the optical drive, and then turn off the computer. 3. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the
Clear CMOS jumper. 4. Move the jumper from the standard position to the maintenance position. 5. Reconnect the power cords for the computer and the monitor to electrical outlets. 6. Turn on the computer and the monitor. When the computer beeps, the recovery process begins. 7. After the recovery process is completed, the computer will be turned off automatically.

Chapter 4. Service checkout and symptom-to-FRU index 39

Note: Depending on the computer model, the recovery process will take two to three minutes. 8. Disconnect all power cords from electrical outlets. 9. Move the jumper back to the standard position. 10. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and
the monitor to electrical outlets. 11. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1. 12. To prevent data loss, ensure that BIOS settings are restored to an earlier point.
Clear CMOS
1. Remove all media from the drives and turn off all connected devices and the computer. 2. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the
Clear CMOS jumper. 3. Move the jumper from the standard position to the maintenance position. 4. Reconnect the power cords for the computer and the monitor to electrical outlets. 5. Turn on the computer and the monitor. When the computer beeps, wait for approximately 10 seconds. 6. Turn off the computer by holding the power button for approximately four seconds. 7. Disconnect all power cords from electrical outlets. 8. Move the jumper back to the standard position. 9. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and
the monitor to electrical outlets. 10. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1. 11. To prevent data loss, ensure that BIOS settings are restored to an earlier point.
40 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Chapter 5.

Diagnostics

Use diagnostic solutions to test hardware components and report operating- system-controlled settings that interfere with the correct operation of your computer.
Basic procedure for resolving computer problems
Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
1. Check that: a. The cables for all connected devices are connected correctly and securely. b. All components have been reassembled correctly. 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 “Self-help resources” on page 42 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 42. 6. If the problem persists, contact Lenovo.
UEFI diagnostic program
A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.
To run the UEFI diagnostic program, do the following: 1. Turn on the computer. If the computer cannot be turned on, go to “Basic procedure for resolving computer problems” on page 41. If an error code is displayed, go to “Symptom- to-FRU index” on page 34 for error code descriptions and troubleshooting hints. 2. Repeatedly press and release the F10 key when turning on the computer. The main screen of the UEFI diagnostic program is displayed. 3. Follow the instructions on the screen to use the diagnostic program.
The options on the main screen are as follows:

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Table 1. Options on the main screen of the UEFI diagnostic program

DIAGNOSTICS

TOOLS

· CPU [U] · DISPLAY [D] · MEMORY [E] · MOTHERBOARD [H] · PCI EXPRESS [P] · STORAGE [S] · AUDIO [Z] · OPTICAL [O] · RUN ALL [R]

· SYSTEM INFORMATION [F1] · BAD BLOCK RECOVERY [F3] · SMART INFORMATION [F5]

Note: The options on the main screen might vary, depending on the hardware configuration and the UEFI diagnostic program version preinstalled on the computer.

Lenovo diagnostic tools
For information about Lenovo diagnostic tools, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions

Use the Vantage app
The Vantage app 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 support representative.

Self-help resources
Use the following self-help resources to learn more about the computer and troubleshoot problems.

Resources Troubleshooting and frequently asked questions Accessibility information

How to access?
· https://www.lenovo.com/tips · https://forums.lenovo.com https://www.lenovo.com/accessibility

42 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Resources

How to access?

Reset or restore Windows
Use the Vantage app to: · Configure device settings. · Download and install UEFI BIOS, drivers and firmware
updates. · Secure you computer from outside threats. · Diagnose hardware problems. · Check the computer warranty status. · Access User Guide and helpful articles.

· Use Lenovo recovery options. 1. Go to https://support.lenovo.com/ HowToCreateLenovoRecovery. 2. Follow the on-screen instructions.
· Use Windows recovery options. 1. Go to https://pcsupport.lenovo.com. 2. Detect your computer or manually select your computer model. 3. Navigate to the troubleshooting menu to diagnose the operating system for recovery instructions.
Type Vantage in the Windows search box.

Note: The available features vary depending on the computer model.
Product documentation: · Safety and Warranty Guide · Generic Safety and Compliance Notices · Setup Guide · This User Guide · Regulatory Notice
Lenovo Support Web site with the latest support information of the following: · Drivers and software · Diagnostic solutions · Product and service warranty · Product and parts details · Knowledge base and frequently asked questions

Go to https://pcsupport.lenovo.com. Then, follow the onscreen instructions to filter out the documentation you want.
https://pcsupport.lenovo.com

Windows help information

· Type Get Help or Tips in the Windows search box.
· Use Windows Search or the Cortana® personal assistant.
· Microsoft support Web site: https://support.microsoft.com

Chapter 5. Diagnostics 43

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Chapter 6.

Hardware removal and installation

This chapter provides instructions on how to remove and install hardware for your computer.

Handling static-sensitive devices
Do not open the static-protective package containing the new part until the defective part has been removed and you are ready to install the new part. Static electricity, although harmless to you, can seriously damage computer components and options.
When you handle options and other computer components, take these precautions to avoid static-electricity damage:
· Limit your movement. Movement can cause static electricity to build up around you.
· Always handle options and other computer components carefully. Handle PCI/PCIe cards, memory modules, system boards, and microprocessors by the edges. Never touch any exposed circuitry.
· Prevent others from touching the options and other computer components.
· Touch the static-protective package containing the part to a metal expansion-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 a smooth, level surface and place the part on the package.
· Do not place the part on the computer cover or other metal surface.

Service tool kit
Ensure that the following common service tool kit is prepared before you service the computer.

No.

Tool name

Specific

Product scope

Tool type

1

Screw driver: Phillips Head 0

PH0

All

Common tool

2

Screw driver: Phillips Head 00

PH00

All

Common tool

3

Screw driver: Phillips Head 01

1

All

Common tool

4

Screw driver: Phillips Head 01

1, Shank length greater than 6

ThinkSation/DT

Common tool

inches

5

Screw driver: Phillips Head 02

2, Shank length greater than 6 ThinkSation/SC/DT Common tool

inches

6

Screw driver: Torx Head T5

T5

IdeaPad

Common tool

© Copyright Lenovo 2024

45

No.

Tool name

Specific

Product scope

Tool type

7

Screw driver: Torx Head T15

T15, for Chassis outside

ThinkSation

Common tool

8

Screw driver: Torx Head T20

T20, Shank length greater than

ThinkSation

6 inches, for heatsink and CPU

9

Screw driver: Torx Head T30

T30, Shank length greater than

ThinkSation

6 inches, for heatsink and CPU

10

Pry tools 1

N/A

All

Common tool Common tool Common tool

11

Tweezers (conductive)

N/A

All

Common tool

12

Tweezers (isolated)

N/A

All

Common tool

13

Suction cup

N/A

All

Common tool

14

Hexagonal socket (for VGA )

H5 mm or 4.8 mm

ThinkCentre/Tiny

Common tool

15

Hexagonal socket (for

Tiny antenna)

H8 mm

ThinkCentre/Tiny

Common tool

16

Ajustable Torque Screwdriver

0.2 Nm to 4.0 Nm,

All

Threadripper CPU, CAMM, etc

Common tool

17

ESD Mat

ESD Mat

All

Common tool

18

USB Flash Drives

19

USB-C to USB-A Converter

For Golden Key, Chrome Reloads, AutoPilot, etc
For USB-C only systems

All

Common tool

All

Common tool

20

SSD/WWAN/IC Thermal pad

Variety of thickness, most

All

common 0.5mm thickness pad

under the component

21 Silicone grease for CPU or heatsink

N/A

All

repairing

22

Polyamide tape

N/A

All

Consumable Consumable Consumable

23

Mylar tape

N/A

All

Consumable

46 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

No.

Tool name

Specific

Product scope

Tool type

24

Eraser

N/A

All

Consumable

25

Electrical tape

N/A

All

Consumable

26

Double sided tape

N/A

All

Consumable

27

Conductive tape

N/A

All

Consumable

28

Cleaning pads/wipes

N/A

All

Consumable

29

Heat gun

30

Brown brush

N/A 25 mm to 35 mm wide

All

Special Tool

(Depot only)

All

Special tool

31

Contact Cleaner Spray

32

Hexagonal socket

WD-40 Contact Cleaner for battery connector
17 mm

ThinkPad X1 Carbon
Yoga AIO 7 27ACH6/ Yoga AIO 7 27ARH6

Special tool Special tool

Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps. For parts with silicone grease applied, it is suggested that you apply new grease during the installation.
Major FRUs and CRUs
Your computer contains the following types of CRUs and FRUs:
· Self-service CRUs: Refer to parts that can be replaced easily by customer themselves or by trained service technicians at an additional cost.
· Optional-service CRUs: Refer to parts that can be replaced by customers with a greater skill level. Trained service technicians can also provide service to replace the parts under the type of warranty designated for the customer’s machine.
· FRUs: Refer to parts that must be replaced only by trained service technicians. If customers choose to replace the FRUs by themselves, the product warranty might be affected.

Chapter 6. Hardware removal and installation 47

Number 1 2 3 4 5

Description Heat sink and fan assembly Memory module Wi-Fi card Wi-Fi card cover M.2 solid-state drive (type 1)*

48 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Self-service CRU No Yes No No Yes

Optional-service CRU No No No No No

Number 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Description M.2 solid-state drive (type 2) Microprocessor System board HDMI connector cover DisplayPort connector cover PCIe slot cover M.2 solid-state drive bracket Heat sink for the M.2 Solid-state drive (type 1) Heat sink for the M.2 Solid-state drive (type 2) Heat sink for the M.2 Solid-state drive (type 3) Intrusion switch kit Card reader Card reader bracket Illuminated red dot cable Power button cable Front I/O bracket Thermal sensor Internal speaker Wi-Fi antennas Optical drive latch Optical drive Optical drive bezel Optical drive cable Front bezel Think dust shield Vertical stand Power cord Mouse Keyboard 3.5-inch hard disk drive tray 3.5-inch hard disk drive Storage drive cable 2.5-inch hard disk drive tray Power supply assembly Chassis E-lock*

Self-service CRU Yes No No Yes Yes Yes Yes Yes Yes Yes No No No No No No No No No Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes No Yes No No No

Optional-service CRU No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No Yes No Yes

Chapter 6. Hardware removal and installation 49

Number 42 43 44 45 46 47 48

Description Smart cable clip PCI-Express card Rear I/O shielding Thumb screws PCI-Express connector cable Computer cover Air deflector

Self-service CRU Yes Yes No Yes No Yes Yes

Optional-service CRU No No No No No 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

System board connector

M70s Gen 5

Item 1 3 5 7

Description 8-pin power connector Microprocessor fan connector Memory slot (DIMM2) Power button connector

Item 2 4 6 8

Description Microprocessor socket Memory slot (DIMM1) Illuminated red dot connector Internal speaker connector

50 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Item 9 11 13 15
17
19 21 23 25 27

Description M.2 solid-state drive slot SATA power connector Auxiliary fan connector Thermal sensor connector Clear CMOS (Complementary Metal Oxide Semiconductor)/Recovery jumper Parallel connector M.2 Wi-Fi card slot PCI Express x16 card slot PS/2 keyboard and mouse connector Intrusion switch connector

M90s Gen 5

Item 10 12 14 16
18
20 22 24 26

Description 10­pin power connector SATA 3.0 connectors Coin-cell battery Front USB-A connector (Hi-Speed USB)
Serial (COM2) connector
Serial (COM1) connector PCI Express x1 card slot System fan connector E-lock connector

Item 1 3 5 7

Description PS/2 keyboard and mouse connector Microprocessor socket Memory slot (DIMM1) Memory slot (DIMM3)

Item 2 4 6 8

Description 8-pin power connector Microprocessor fan connector Memory slot (DIMM2) Memory slot (DIMM4)

Chapter 6. Hardware removal and installation 51

Item 9 11 13
15
17 19 21 23 25 27 29 31 33

Description Power button connector Auxiliary fan connector 2 10-pin power connector Clear CMOS (Complementary Metal Oxide Semiconductor)/Recovery jumper SATA 3.0 connectors M.2 solid-state drive slot 2 Front USB-A connector (Hi- Speed USB) 1 Front USB-A connector (Hi-Speed USB) 2 Serial (COM2) connector PCI Express x16 card slot E-lock connector Serial (COM1) connector Coin-cell battery

Item 10 12 14
16
18 20 22 24 26 28 30 32 34

Description Internal speaker connector Illuminated red dot connector SATA power connectors
Auxiliary fan connector 1
M.2 solid-state drive slot 1 Thermal sensor connector M.2 Wi-Fi card slot Parallel connector PCI Express x1 card slot PCI Express x16 card slot System fan connector Intrusion switch connector Optional connector

Removing and installing hardware
This section provides instructions on how to remove and install hardware for your computer.
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Important safety information” on page 1.
External options
You can connect external options to your computer, such as external speakers, a printer, or a scanner. For some external options, you must install additional software in addition to making the physical connection. When installing an external option, see Chapter 3 “Product overview” on page 29 to identify the required connector. Then, use the instructions that come with the option to help you make the connection and install any required software or device drivers.
Vertical stand
Prerequisite Before you start, read Generic Safety and Compliance Notices, 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 computer.

52 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Removal steps
Computer cover
Prerequisite 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 cables from the computer. 3. Unlock any locking device that secures the computer cover. 4. Remove the vertical stand. See “Vertical stand” on page 52. 5. Lay down the computer to place the computer cover facing up.
Chapter 6. Hardware removal and installation 53

Removal steps

Note: If a locking device is available, use it to lock the computer after installing the computer cover.

Screw (quantity) Thumb Screw of side cover for LC (2)

Torque 3 ± 0.5 lb/in

Optical drive

Prerequisite Before 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 53. 2. Disconnect the signal and power cable from the optical drive.
Replacement procedure

54 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Chapter 6. Hardware removal and installation 55

56 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Front bezel
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the following parts in order, if any: · “Computer cover” on page 53 · “Optical drive” on page 54
Chapter 6. Hardware removal and installation 57

Replacement procedure
Drive bay assembly
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 58 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Replacement procedure
Hard disk drive
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines: · Replace the internal storage drive only for 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 the internal storage drive.
Chapter 6. Hardware removal and installation 59

· Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage drive on a soft material, such as cloth, to absorb physical shocks.
For access, do the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. On the bottom of the drive bay assembly, disconnect the signal cable and the power cable from the 3.5inch primary hard disk drive.
Removal steps
M.2 solid-state drive
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. 60 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.
Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the internal storage drive, observe the following guidelines:
· 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 the internal storage drive. · Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage
drive on a soft material, such as cloth, to absorb physical shocks.
For access, remove these parts in order, if any:
· “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58
Removal steps M70s Gen 5

Screw (quantity) Screw M2 x 3, Zn coated (1)

Torque 1.5 ± 0.2 lb/in

M90s Gen 5
Remove the M.2 solid-state drive depending on the computer model: · For computers without the heat sink for the M.2 solid-state drive:

Chapter 6. Hardware removal and installation 61

· For computers with the heat sink for the M.2 solid-state drivedo one of the following depending on the computer model: ­ Type 1
­ Type 2 62 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

­ Type 3
Note: Remove the film that covers the thermal pad (if any) when installing the M.2 solid-state drive.
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: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57
Chapter 6. Hardware removal and installation 63

· “Drive bay assembly” on page 58 · “M.2 solid-state drive” on page 60 Replacement procedure
Memory module
Prerequisite 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. · M70s Gen 5
· M90s Gen 5
For access, remove these parts in order: 64 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

· “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 Replacement procedure
Note: During the installation, ensure that you align the memory module to the slot and press down on both ends until the latches are fully engaged with a click.
PCI-Express slot cover
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, remove the “Computer cover” on page 53. Removal steps
Chapter 6. Hardware removal and installation 65

PCI-Express card
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the followings:
1. Remove the computer cover. See “Computer cover” on page 53. 2. Disconnect the PCI-Express cables from the system board if any. Replacement procedure
Note: Do not attempt to install any PCI-Express cards other than graphics card to the PCI-Express slot next to the microprocessor. · M70s Gen 5
66 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

· M90s Gen 5
Power supply assembly
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. Although there are no moving parts in the computer after the power cord has been disconnected, the following warnings are required for your safety.
Chapter 6. Hardware removal and installation 67

Keep fingers and other parts of your body away from hazardous, moving parts. 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 the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the power supply assembly cables from the system board.
Removal steps

Screw (quantity) Screw, #6-32 x L8, Hexhead (3)

Torque 5 ± 0.5 lb/in

E-lock

Prerequisite Before you start, read Generic 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 53 · “PCI-Express card” on page 66

68 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

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

Screw (quantity) M3 x 5-T15-SCREW (1)

Torque 5 ± 0.5 lb/in

PCI-Express connector cable

Prerequisite Before 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 53. 2. Disconnect the cable from the system board.
Removal steps

Air deflector
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
Chapter 6. Hardware removal and installation 69

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. Disconnect all power cords from electrical outlets and disconnect all cables from the computer. 2. Remove the vertical stand. See “Vertical stand” on page 52. Removal steps
Wi-Fi card
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 53 70 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

· “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58
Removal steps

Screw (quantity) Screw M2 x 3, Zn coated (1)

Torque 1.5 ± 0.2 lb/in

Note: During installation, ensure that you connect the gray cable to the connector labeled AUX on the card, and the black cable to the connector labeled MAIN.
Wi-Fi antenna

Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, do the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the Wi-Fi antenna cables from the Wi-Fi card. See “Wi-Fi card” on page 70.
Removal steps

Chapter 6. Hardware removal and installation 71

Internal speaker
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, do the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the internal speaker cable from the system board.
Removal steps

Screw (quantity) Screw M3.5 x 5 (self) for speaker (2)

Torque 5 ± 0.5 lb/in

Illuminated red dot cable

Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, do the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the illuminated red dot cable from the system board.

72 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Removal steps
Thermal sensor
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following:
1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58
2. Disconnect the thermal sensor cable from the system board. Removal steps
Front IO bracket and power button
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions. For access, do the following:
1. Remove these parts in order: Chapter 6. Hardware removal and installation 73

· “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the power button cable and the card reader cable from the system board.
Replacement procedure

Screw (quantity) Screw, #6-32 x L8, Hexhead (1)

Torque 5 ± 0.5 lb/in

74 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Card reader and card reader bracket
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, do the following: 1. Remove these parts in order: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 · “Front IO bracket and power button” on page 73 2. Disconnect the card reader cable from the system board.
Removal steps

Screw (quantity) Screw, #6-32, (1)

Torque 5 ± 0.5 lb/in
Chapter 6. Hardware removal and installation 75

Screw (quantity) Screw, M3 x 5, phlip head, (2)

Torque 5 ± 0.5 lb/in

Heat sink and fan assembly

Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
CAUTION:

The heat sink and microprocessor 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: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 2. Disconnect the microprocessor fan cable from the system board.
Replacement procedure Depending on the computer model, the heat sink and fan assembly might vary. To replace the heat sink and fan assembly:

76 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Screw (quantity) #6-32 (4)

Torque 5 ± 0.5 lb/in

Microprocessor

Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
CAUTION:

The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. For access, remove these FRUs in order, if any: · “Computer cover” on page 53
Chapter 6. Hardware removal and installation 77

· “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 · “Heat sink and fan assembly” on page 76 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 as possible. Removal steps
Note: Before you attach the microprocessor to the computer, clean all thermal grease that has been used and then apply new thermal grease. Apply new thermal grease at an amount of 0.35 grams, on the parts marked a as shown in the following illustrations. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component.
Figure 1. Illustrations of the thermal grease area
78 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

System board
Prerequisite Before you start, read Generic Safety and Compliance Notices, and print the following instructions.. CAUTION:
The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. For access, remove these parts in order, if any: · “Computer cover” on page 53 · “Optical drive” on page 54 · “Front bezel” on page 57 · “Drive bay assembly” on page 58 · “M.2 solid-state drive” on page 60 · “Memory module” on page 64 · “PCI-Express card” on page 66 · “E-lock” on page 68 · “PCI-Express connector cable” on page 69 · “Wi-Fi card” on page 70 · “Front IO bracket and power button” on page 73 · “Card reader and card reader bracket” on page 75 · “Heat sink and fan assembly” on page 76 · “Microprocessor” on page 77 Record the cable routing and cable connections, and then disconnect all cables from the system board. See · “M70s Gen 5” on page 50 · “M90s Gen 5” on page 51
Chapter 6. Hardware removal and installation 79

Removal steps

Screw (quantity) M3 x 8, Cheesehead (9)

Torque 5 ± 0.5 lb/in

Note: The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling.
When installing: Clean all thermal grease that have been used and then apply new thermal grease if needed.
Intrusion switch kit

Prerequisite Before 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 53. 2. Disconnect the intrusion switch cable from the system board.
Removal steps

80 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Screw (quantity) Screw, #6-32 (1)

Torque 5 ± 0.5 lb/in

Chapter 6. Hardware removal and installation 81

82 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

Chapter 7.

Notices and trademarks

Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local 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. However, it is the user’s responsibility to evaluate and verify the operation of any other product, program, or service.
Lenovo may have patents or pending patent programs covering subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:
Lenovo (United States), Inc. 8001 Development Drive Morrisville, NC 27560 U.S.A. Attention: Lenovo Director of Licensing
LENOVO PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
Changes are made periodically to the information herein; these changes will be incorporated in new editions of the publication. To provide better service, Lenovo reserves the right 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 configuration of the product, refer to the related contract (if any) or product packing list, or consult the distributor for the product sales. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.
The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications or warranties. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties. All information contained in this document was obtained in specific environments and is presented as an illustration. The result obtained in other operating environments may vary.
Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.
Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk.
Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made

© Copyright Lenovo 2024

83

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. Intel and Thunderbolt are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. Microsoft, Windows, and Cortana 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 and Miracast are registered trademarks of Wi-Fi Alliance. USB-C is a registered trademark of USB Implementers Forum. All other trademarks are the property of their respective owners.
84 M70s Gen 5 M90s Gen 5 Hardware Maintenance Manual

References

• Lenovo Computer Parts | Genuine Replacement Parts | Lenovo Support US
• Official Lenovo Laptop, Accessories & PC Support - Lenovo Support US
• Lenovo Diagnostic Solutions: Overview - Lenovo Support US
• Lenovo Support | Drivers, Troubleshooting, Warranty, Repair | Lenovo Support US
• Lenovo Digital Download Recovery Service (DDRS) - Download the files needed to create a Lenovo USB Recovery key - Lenovo Support US
• Lenovo Computer Parts | Genuine Replacement Parts | Lenovo Support US
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