Table of Contents
- Chapter 1. Important safety information
- Chapter 2. Important service information
- Chapter 3. Product overview
- Chapter 4. Service checkout and symptom-to-FRU index
- Chapter 5. RAID
- Chapter 6. Troubleshooting, diagnostics, and recovery
- Chapter 7. Hardware removal and installation
- Handling static-sensitive devices
- Service tool kit
- Major FRUs and CRUs
- System board
- Internal storage drives
- Removing and installing hardware
- External options
- ID badge
- Computer cover
- Serial COM cable
- Device in the flex bay
- Storage drive in the front-access storage enclosure
- Device in the multi-drive conversion kit
- Device in the flex module
- Front panel I/O cage
- Cover presence switch
- Front fan assembly
- Storage drive in a storage drive bay
- Storage drive cage
- M.2 solid-state drive
- Power supply assembly
- PCIe card
- Full-length PCIe card
- Rear fan assembly
- Memory module active cooler and duct
- Memory module
- Coin-cell battery
- Wi-Fi units
- Heat-sink-and-fan assembly
- Microprocessor
- System board
- Appendix A. Notices and trademarks
Lenovo P620 User Manual
Displayed below is the user manual for P620 by Lenovo which is a product in the PCs/Workstations category. This manual has pages.
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P620
Hardware Maintenance Manual
Second Edition (February 2021)
© Copyright Lenovo 2020, 2021.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.
Contents
Chapter 1. Important safety
information. . . . . . . . . . . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 2
Safety inspection guide . . . . . . . . . . . . . 3
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . . . . . 4
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multi-lingual translations) . . . . . . 4
Chapter 2. Important service
information. . . . . . . . . . . . . . . 27
Strategy for replacing FRUs . . . . . . . . . . 27
Strategy for replacing a hard disk drive or a
solid-state drive . . . . . . . . . . . . . 27
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 27
How to use error codes . . . . . . . . . . 28
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 28
Product definition . . . . . . . . . . . . 28
FRU identification . . . . . . . . . . . . 28
Chapter 3. Product overview . . . . . 29
Front . . . . . . . . . . . . . . . . . . . 29
Rear . . . . . . . . . . . . . . . . . . . 31
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 33
Service checkout . . . . . . . . . . . . . . 33
Problem determination tips . . . . . . . . 33
Symptom-to-FRU index . . . . . . . . . . . 34
Hard disk drive boot error . . . . . . . . . 34
Power supply problems . . . . . . . . . . 35
Beep symptoms . . . . . . . . . . . . . 35
POST error codes . . . . . . . . . . . . 36
Miscellaneous error conditions . . . . . . . 37
Undetermined problems . . . . . . . . . 39
Chapter 5. RAID . . . . . . . . . . . . 41
What is RAID . . . . . . . . . . . . . . . . 41
Select RAID mode . . . . . . . . . . . . . . 41
RAID Levels . . . . . . . . . . . . . . . . 41
Configure RAID with RAIDXpert2 Configuration
Utility . . . . . . . . . . . . . . . . . . . 42
Chapter 6. Troubleshooting,
diagnostics, and recovery . . . . . . . 45
Basic procedure for resolving computer
problems . . . . . . . . . . . . . . . . . 45
Troubleshooting . . . . . . . . . . . . . . 45
Startup problems . . . . . . . . . . . . 46
Audio problems . . . . . . . . . . . . . 47
Network problems . . . . . . . . . . . . 47
Performance problems . . . . . . . . . . 50
Storage drive problems . . . . . . . . . . 51
CD or DVD problems . . . . . . . . . . . 51
Serial connector problems . . . . . . . . . 52
USB device problems . . . . . . . . . . 52
Software problems. . . . . . . . . . . . 53
Diagnostics . . . . . . . . . . . . . . . . 53
Lenovo diagnostic tools . . . . . . . . . . 53
ThinkStation Diagnostics . . . . . . . . . 53
Lenovo PC Diagnostics . . . . . . . . . . 54
UEFI diagnostic program . . . . . . . . . 54
Recovery . . . . . . . . . . . . . . . . . 55
Restore system files and settings to an earlier
point . . . . . . . . . . . . . . . . . 55
Restore your files from a backup . . . . . . 55
Reset your computer . . . . . . . . . . . 55
Use advanced options . . . . . . . . . . 55
Windows automatic recovery. . . . . . . . 56
Create and use a recovery USB device . . . . 56
Update the device driver . . . . . . . . . 56
Chapter 7. Hardware removal and
installation . . . . . . . . . . . . . . . 59
Handling static-sensitive devices . . . . . . . . 59
Service tool kit . . . . . . . . . . . . . . . 59
Major FRUs and CRUs . . . . . . . . . . . . 60
System board . . . . . . . . . . . . . . . 63
Internal storage drives . . . . . . . . . . . . 66
Removing and installing hardware . . . . . . . 67
External options . . . . . . . . . . . . . 67
ID badge. . . . . . . . . . . . . . . . 67
Computer cover . . . . . . . . . . . . . 68
Serial COM cable . . . . . . . . . . . . 72
Device in the flex bay . . . . . . . . . . . 73
Storage drive in the front-access storage
enclosure . . . . . . . . . . . . . . . 76
Device in the multi-drive conversion kit . . . . 78
Device in the flex module . . . . . . . . . 83
Front panel I/O cage . . . . . . . . . . . 87
Cover presence switch . . . . . . . . . . 88
Front fan assembly. . . . . . . . . . . . 89
Storage drive in a storage drive bay . . . . . 90
Storage drive cage . . . . . . . . . . . . 93
© Copyright Lenovo 2020, 2021 i
M.2 solid-state drive . . . . . . . . . . . 96
Power supply assembly . . . . . . . . . . 102
PCIe card . . . . . . . . . . . . . . . 103
Full-length PCIe card . . . . . . . . . . . 106
Rear fan assembly . . . . . . . . . . . . 108
Memory module active cooler and duct. . . . 110
Memory module . . . . . . . . . . . . . 110
Coin-cell battery. . . . . . . . . . . . . 112
Wi-Fi units . . . . . . . . . . . . . . . 114
Heat-sink-and-fan assembly . . . . . . . . 116
Microprocessor . . . . . . . . . . . . . 117
System board. . . . . . . . . . . . . . 121
Appendix A. Notices and
trademarks. . . . . . . . . . . . . . . 125
ii P620 Hardware Maintenance Manual
About this manual
This manual provides service and reference information for ThinkStation® 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 ThinkStation
computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Before servicing a ThinkStation computer, be sure to read and understand Chapter 1 “Important safety
information” on page 1.
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 2020, 2021 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.
2P620 Hardware Maintenance Manual
• Do not service the following parts with the power on when they are removed from their normal operating
places in a machine:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators
and similar units. (This practice ensures correct grounding of the units.)
• 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.
Chapter 1.Important safety information 3
8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered
with.
Handling electrostatic discharge-sensitive devices
Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects.
Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the
person handling the part are all at the same charge.
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
4P620 Hardware Maintenance Manual
• Italian
• Korean
• Spanish
DANGER
Electrical current from power, telephone and communication cables is hazardous.
To avoid a shock hazard:
• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
• 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 To Disconnect
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device ON.
1. Turn everything OFF.
2. First, remove power cords from outlet.
3. Remove signal cables from 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.
Chapter 1.Important safety information 5
CAUTION:
When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are
installed, note the following:
• Do not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• 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) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
CAUTION:
The power control button on the device and the power switch on the power supply do not turn off 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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6P620 Hardware Maintenance Manual
≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb)
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8P620 Hardware Maintenance Manual
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: Para Desconectar:
1. DESLIGUE Tudo.
2. Primeiramente, conecte todos os cabos aos
dispositivos.
3. Conecte os cabos de sinal aos conectores.
4. Conecte os cabos de alimentação às tomadas.
5. LIGUE os dispositivos.
1. DESLIGUE Tudo.
2. Primeiramente, remova os cabos 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.
PRECAUCIÓN:
Chapter 1.Important safety information 9
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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10 P620 Hardware Maintenance Manual
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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.
14 P620 Hardware Maintenance Manual
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.
• Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen.
16 P620 Hardware Maintenance Manual
• 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 Zum Abziehen 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.
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
Einige Lasergeräte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes:
Chapter 1.Important safety information 17
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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18 P620 Hardware Maintenance Manual
1
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PERICOLO
La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere
pericolosa.
Per evitare il rischio di scosse elettriche:
20 P620 Hardware Maintenance Manual
• 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 Per scollegarsi
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.
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:
Quando vengono installati prodotti laser (quali CD-ROM, unità DVD-ROM, unità a fibre ottiche o
trasmittenti), tener presente quanto segue:
Chapter 1.Important safety information 21
• 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 ≥55 kg
ATTENZIONE:
Prestare attenzione nel sollevare l'apparecchiatura.
ATTENZIONE:
Il pulsante di controllo dell'alimentazione presente sull'unità e l'interruttore dell'alimentatore non
disattivano l'alimentazione corrente 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 P620 Hardware Maintenance Manual
1
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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.
• 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.
24 P620 Hardware Maintenance Manual
• 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 Para desconectar
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.
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.
PELIGRO
Chapter 1.Important safety information 25
Algunos productos láser tienen incorporado un diodo láser de clase 3A o clase 3B. Tenga en cuenta lo
siguiente:
Cuando se abre, queda expuesto a radiación láser. No mire directamente al rayo láser, ni siquiera con
instrumentos ópticos, y evite exponerse directamente al rayo láser.
≥18 kg ≥32 kg ≥55 kg
PRECAUCIÓN:
Adopte procedimientos seguros al levantar el equipo.
PRECAUCIÓN:
El botón de control de alimentación del dispositivo y el interruptor de alimentación de la fuente de
alimentación no desconectan la corriente eléctrica suministrada al dispositivo. Además, el dispositivo
podría tener más de un cable de alimentación. Para suprimir toda la corriente eléctrica del dispositivo,
asegúrese de que todos los cables de alimentación estén desconectados de la toma de corriente.
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26 P620 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.
© Copyright Lenovo 2020, 2021 27
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.
28 P620 Hardware Maintenance Manual
Chapter 3. Product overview
Front
1. Optical drive eject button* Eject the optical drive tray.
2. Optical drive activity indicator* This indicator is on when the optical drive is in use.
3. Power button
Press to turn on the computer.
To turn off the computer, open the Start menu, click Power, and then select
Shut down.
The indicator in the power button shows the system status of your computer.
• Blinking for three times: The computer is initially connected to power.
• On: The computer is on.
• Off: The computer is off or in hibernation mode.
• Blinking rapidly: The computer is entering sleep or hibernation mode.
• Blinking slowly: The computer is in sleep mode.
4. Power indicator This indicator is on when the computer is turned on.
5. Storage drive activity indicator This indicator is on when the storage drive is in use.
6. Photoelectric sensor*
This sensor receives the flash light sent by the Lenovo PC Diagnostics application
installed in the smartphone. Then, the photoelectric sensor triggers the computer
to send the tune of the detected error to the smartphone for users to decode the
error.
© Copyright Lenovo 2020, 2021 29
7. Headset connector Connect a headset or headphones to your computer.
8. Four-digit diagnostic display Display a four-digit error code when an issue or error is detected. You can check
the error code at https://thinkworkstationsoftware.com/diags.
9. USB 3.2 connector Gen 2 (with
charging function)
• Charge USB- compatible devices with the output voltage and current of 5 V
and 2.1 A.
• Enable you to experience higher data transfer rate when you connect USB-
compatible devices, such as a USB keyboard, USB mouse, USB storage
device, or USB printer.
10. USB 3.2 connector Gen 2
Enable you to experience higher data transfer rate when you connect USB-
compatible devices, such as a USB keyboard, USB mouse, USB storage device,
or USB printer.
11. USB-C® (3.2 Gen 2)
connector
• Charge USB-C compatible devices with the output voltage and current of 5 V
and 3 A.
• Transfer data at USB 3.2 speed, up to 10 Gbps.
* for selected models
30 P620 Hardware Maintenance Manual
Rear
1. Microphone connector Connect a microphone to your computer when you want to record sound or
interact with the computer using speech recognition software.
2. Audio line-out connector
Send audio signals from the computer to external devices, such as powered
stereo speakers, headphones, or multimedia keyboards. To connect a stereo
system or other external recording device, connect a cable between the audio
line-in connector of the device and the audio line-out connector of the computer.
Note: If your computer has both an audio line-out connector and a headset or
headphone connector, always use the headset or headphone connector for
earphones, headphones, or a headset. The headphone connector does not
support headset microphones.
3. Audio line-in connector
Receive audio signals from an external audio device, such as a stereo system. To
connect an external audio device, connect a cable between the audio line-out
connector of the device and the audio line-in connector of the computer.
4. Serial connector* Connect an external modem, a serial printer, or other devices that use a serial
connector.
5. PS/2 keyboard connector* Connect a keyboard that uses a Personal System/2 (PS/2) keyboard connector.
6. PS/2 mouse connector* Connect a mouse, a trackball, or other pointing devices that use a PS/2 mouse
connector.
7. USB 2.0 connectors Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB
storage device, or USB printer.
8. USB 3.2 connectors Gen 2
Enable you to experience higher data transfer rate when you connect USB-
compatible devices, such as a USB keyboard, USB mouse, USB storage device,
or USB printer.
Chapter 3.Product overview 31
9. Ethernet connector
Connect to a local area network (LAN). When the green indicator is on, the
computer is connected to a LAN. When the yellow indicator blinks, data is being
transmitted.
10. PCI-Express card area
Install PCI-Express cards into this area to improve the operating performance of
the computer. Depending on the computer model, the connectors in this area
vary.
11. Power cord connector Connect the power cord to your computer for power supply.
12. Key-nest slots Install the key holder that comes with the computer-cover-lock key to the key-nest
slots.
13. Security-lock slot Lock your computer to a desk, table, or other fixtures through a Kensington-style
cable lock.
* for selected models
32 P620 Hardware Maintenance Manual
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 “Diagnostics” on page 53.
• 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?
© Copyright Lenovo 2020, 2021 33
– 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 FRU/Action
The start-up drive is not in the boot sequence in
configuration.
Check the configuration and ensure that the start-up drive
is in the boot sequence.
No operating system installed on the boot drive. Install an operating system on the boot drive.
34 P620 Hardware Maintenance Manual
Error FRU/Action
The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk
drive.
2. Using the operating system programs, format the
hard disk drive.
The drive is defective. Replace the hard disk drive.
Power supply problems
If you suspect a power problem, use the following procedures.
Check/Verify FRU/Action
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
Reseat connectors
Check the power cord for continuity. Power cord
Check the power-on switch for continuity. Power-on switch
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.
The following table describes the beep symptoms.
Beep symptom FRU/Action
2 short beeps: common POST error Common POST error code. See the detailed failure
information in “POST error codes” on page 36.
3 short and 1 long beeps: DRAM memory error Perform the following actions in order:
1. Make sure that the memory modules are properly
seated in the memory slots.
2. Replace the memory modules.
3. Replace the system board (for trained service
personnel only).
4 long beeps: PCIe/PCI MMIO (memory mapped input/
output) resources (error code: 8999)
See the detailed failure information in “POST error codes”
on page 36.
2 long and 3 short beeps: graphics card error 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 POST error message Description/Action
0135 CPU fan failure
Front fan failure
Rear fan failure
DIMM fan failure
This error message is displayed
when a fan fails and the system
might be overheating.
Press F10 to exit.
0211 Keyboard not found This error message is displayed
when no keyboard is detected.
0162 Setup data integrity check failure This error indicates the checksum
of BIOS Setup data in NVRAM is
bad.
In BIOS Setup, the “Save
Changes and Exit” operation is
needed in order to clear this error.
0164 Memory configuration change has
occurred This error message is displayed
when the memory size is
changed.
Press F10 to exit.
1762 Storage device configuration change
has occurred This error message is displayed
when a hard disk drive change or
an optical drive change has been
made.
Press F10 to exit.
36 P620 Hardware Maintenance Manual
8999 Not enough PCIe/PCI MMIO
resources. Currently only one video
card is enabled. Remove some PCIe
cards.
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 FRU/Action
Changing display colors Display/Monitor
Computer will not power-off. See “Hard disk drive boot
error” on page 34. 1. Power Switch
2. System Board
3. Riser card, if installed.
Computer will not RPL from server 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
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
Chapter 4.Service checkout and symptom-to-FRU index 37
Message/Symptom FRU/Action
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.
Serial or parallel connector device failure (system board
connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. System Board
38 P620 Hardware Maintenance Manual
Message/Symptom FRU/Action
Serial or parallel connector device failure (adapter
connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. Alternate Adapter
5. System Board
Some or all keys on the keyboard do not work 1. Keyboard
2. Keyboard Cable
3. 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 7 “Hardware removal and installation” on page 59.
Chapter 4.Service checkout and symptom-to-FRU index 39
40 P620 Hardware Maintenance Manual
Chapter 5. RAID
What is RAID
Redundant Array of Independent Disks (RAID) is a technology that provides increased storage functions and
reliability through redundancy. It also can improve data storage reliability and fault tolerance compared with
single-drive storage systems. Data loss resulting from a drive failure can be prevented by reconstructing
missing data from the remaining drives.
When a group of independent physical storage drives is set up to use RAID technology, they are in a RAID
array. This array distributes data across multiple storage drives, but the array appears to the host computer
as one single storage unit. Creating and using RAID arrays provides high performance, such as the expedited
I/O performance, because several drives can be accessed simultaneously.
Select RAID mode
You can select the SATA RAID mode or NVMe RAID mode to configure RAID with RAIDXpert2 Configuration
Utility.
1. Do one of the following to select the SATA RAID mode or NVMe RAID mode:
• SATA RAID mode:
a. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.
b. Select Devices ➙ ATA Drive Setup ➙ Configure SATA as (AHCI/RAID).
c. Select RAID.
• NVMe RAID mode:
a. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.
b. Select Devices ➙ NVMe Setup ➙ NVMe RAID Mode (Enabled/Disabled).
c. Select Enabled.
2. Press F10 or Fn+F10 to save the changes and exit.
3. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.
4. Select Devices ➙ RAIDXpert2 Configuration Utility to select drives and configure RAID.
RAID Levels
CAUTION:
• Only one redundant RAID array is supported by AMD-RAID. RAID1, RAID5, and RAID10 are all
redundant arrays.
• The AMD-RAID does not support more than eight arrays, including Non-RAID array.
• Multiple operating systems are not supported on AMD-RAID Array. If the system is booted from an
AMD-RAID bootable array, the first array in the Arrays section must be the bootable array. The
system boots only from the first array in the Arrays section. Refer to “Configure RAID with
RAIDXpert2 Configuration Utility” on page 42 to find the first array by viewing array details and
checking the array number.
Your computer supports the following RAID levels:
• RAID 0: striped disk array
© Copyright Lenovo 2020, 2021 41
– Provide the highest performance but no data redundancy. Data in the array is striped (distributed)
across several disks.
– Support 2-8 disks.
– RAID 0 arrays are useful for holding information, such as the operating system paging file, where
performance is extremely important but redundancy is not.
• RAID 1: mirrored disk array
– Mirror data on a partition of one disk to another.
– Support 2 disks.
– RAID 1 arrays are useful when there are only two disks available and data integrity is more important
than storage capacity.
• RAID 5: block-level striped disk array with distributed parity
– Stripe data as well as parity, across all disks in the array.
– Support 3-8 disks.
– Offer exceptional read performance and redundancy.
• RAID 10: striped and mirrored disk array (a combination of RAID 0 and RAID 1)
– Combine mirrors and stripe sets. RAID 10 allows multiple disk failures, up to 1 failure in each mirror that
has been striped.
– Support 4, 6, or 8 disks.
– Offer better performance than a simple mirror because of the extra disks. Require twice the disk space
of RAID 1 to offer redundancy.
• Volume (JBOD):
– RAIDXpert2 Configuration Utility treats one or more disks or the unused space on a disk as a single
array.
– Support 1-8 disks.
– Provide the ability to link-together storage from one or several disks, regardless of the size of the space
on those disks. It is useful in scavenging space on disks unused by other disks in the array. It does not
provide performance benefits or data redundancy. Disk failure will result in data loss.
• RAIDABLE (also known as RAID Ready):
– Allow a RAIDABLE disk to be transformed later to RAID 0 or RAID 1.
– Support 1 disk.
Configure RAID with RAIDXpert2 Configuration Utility
If your computer comes with the RAIDXpert2 Configuration Utility , you can follow the sections below to
configure RAID.
Initialize disks
New disks and legacy disks must be initialized before they can be used to create an AMD-RAID array.
Initialization writes AMD-RAID configuration information (metadata) to a disk.
CAUTION:
• If a disk is part of an AMD-RAID array, the disk cannot be selected for initialization. To initialize the
disk anyway, delete the AMD-RAID array. Data on the disk is deleted during initialization so ensure
the correct disks are chosen to initialize.
• A legacy disk can contain valid data. When a legacy array is deleted, all data on the disk is lost.
42 P620 Hardware Maintenance Manual
1. Enter the RAIDXpert2 Configuration Utility menu. Then, use the arrow keys to select Physical Disk
Management and press Enter.
2. Use the arrow keys to select Select Physical Disk Operations and press Enter.
3. Use the arrow keys to select Initialize Disk and press Enter.
4. Select the disk(s) to initialize:
a. Use the arrow keys to select a disk and press the Space Bar or Enter. Multiple disks can be selected
using this method.
b. Use the arrow keys to select OK and press Enter.
c. Review the warning message. If you want to proceed, use the arrow keys to select YES and press
Enter.
Note: The Initialization process takes about 10 to 15 seconds. During initialization, a complete re-
scan of all channels is done automatically.
Create arrays
Arrays can be created after the disks are initialized:
1. Enter the RAIDXpert2 Configuration Utility menu. Then, use the arrow keys to select Array
Management and press Enter.
2. Use the arrow keys to select Create Array and press Enter.
3. Use the arrow keys to select Select RAID Level ➙ RAID Level and press Enter.
Note: Some of the RAID levels might not be displayed because the number of installed storage drives
varies.
4. Select the disks with which to create the array:
a. Use the arrow keys to select Physical Disks and press Enter.
b. Use the arrow keys to select desired disks and press the Space Bar or Enter.
c. Use the arrow keys to select Apply Changes and press Enter.
5. Refer to the table below for the default cache tag size (CTS).
Array type Default CTS
HDD Array 64k
SSD Array 64k
All NVMe Array 256k
6. Use the arrow keys to select Read Cache Policy and press Enter. Select the desired read cache policy
and press Enter.
7. Use the arrow keys to select Write Cache Policy and press Enter. Select the desired write cache policy
and press Enter.
8. Use the arrow keys to select Create Array and press Enter.
Delete arrays
CAUTION:
• Deleting an array permanently destroys all data that is on the array. This action cannot be recalled
and it is very unlikely the data can be recovered.
• Do not delete the first array listed in the Arrays section, if it is the AMD-RAID bootable array. Doing
this deletes the operating system and AMD-RAID files.
Chapter 5.RAID 43
1. Enter the RAIDXpert2 Configuration Utility menu. Then, use the arrow keys to select Array
Management and press Enter.
2. Use the arrow keys to select Delete Arrays and press Enter.
3. Select the array(s) to delete:
a. Use the arrow keys to select the desired array or multiple arrays, then press the Space Bar or Enter
to change the option to Enabled for deletion.
b. If you want to select all of the arrays, use the arrow keys to select Check all and press Enter.
c. Use the arrow keys to select Delete Array and press the Space Bar or Enter.
d. Review the warning message. If you want to proceed, press the Space Bar or Enter.
e. Use the arrow keys to select Yes to delete arrays.
View array details
This option displays the details of an array. Nothing can be changed using this menu option. It is for
informational purposes only.
1. Enter the RAIDXpert2 Configuration Utility menu. Then, use the arrow keys to select Array
Management and press Enter.
2. Use the arrow keys to select Select Manage Array Properties and press Enter.
3. Use the arrow keys to select Select Array and press Enter. Select the desired array and press Enter.
4. Use the arrow keys to select View Associated Physical Disks and press Enter.
5. Press the Space Bar to select one of the members of the Array.
6. Use the arrow keys to select View Physical Disk Properties and press Enter.
7. Information about the array is displayed below Select Array header:
• Array number
• RAID level
• State
• Size
• Cache Tag Size
• Cache settings
• Associated physical disks
8. To view another array, press ESC twice and perform steps 2 through 7 again.
9. Press ESC to exit the main menu.
44 P620 Hardware Maintenance Manual
Chapter 6. Troubleshooting, diagnostics, and recovery
This chapter provides solutions to resolve computer problems. Use the basic procedure as a starting point
for resolving computer problems.
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 “Troubleshooting” on page 45 and follow the instructions for the type of problem you are
experiencing.
4. Run the diagnostic program. See “Diagnostics” on page 53.
5. Recover your operating system. See “Recovery” on page 55.
6. If the problem persists, contact Lenovo.
Troubleshooting
Use the troubleshooting information to find solutions to problems that have definite symptoms.
© Copyright Lenovo 2020, 2021 45
Startup problems
Problem Solution
The computer does not start up when you
press the power button.
• Ensure that the power cord is correctly connected to the rear of the
computer and to a working electrical outlet.
• If the computer has a secondary power switch on the rear of the
computer, ensure that it is switched on.
• The power indicator on the front of the computer is on.
• The computer voltage matches the voltage available at the
electrical outlet for your country or region.
The operating system does not start up from
the correct storage drive or fails to start up
• Ensure that all storage drive signal cables and power cables are
connected correctly.
• Ensure that the storage drive the computer starts up from is listed
as the first startup device in UEFI BIOS.
• In rare cases, the storage drive with the operating system might get
corrupted or damaged. In such cases, you might need to replace
the storage drive.
• If the computer is installed with an Optane memory:
– Ensure that the Optane memory is not removed.
– Ensure that the Optane memory is not damaged. Check the
Optane memory using diagnostic tools.
The computer beeps multiple times before
the operating system starts up. Ensure that no keys are stuck.
46 P620 Hardware Maintenance Manual
Audio problems
Problem Solution
The audio cannot be heard on the Windows®
operating system.
• If you are using powered external speakers that have an On/Off
control, ensure that:
– The On/Off control is set to the On position.
– The speaker power cable is connected to a properly grounded,
functional ac electrical outlet.
• If your external speakers have a volume control, ensure that the
volume is not set too low.
• Click the volume icon in the Windows notification area on the
taskbar. Check the speaker and volume settings. Do not mute the
speaker or set the volume at a very low level.
• If your computer has a front audio panel, ensure that the volume is
not set too low.
• Ensure that your external speakers (and headphones, if used) are
connected to the correct audio connector on the computer. Most
speaker cables are color-coded to match the audio connector.
Note: When external-speaker or headphone cables are connected
to the audio connector, the internal speaker, if present, is disabled.
In most cases, if an audio adapter is installed in one of the
expansion slots, the audio function built into the system board is
disabled. Therefore, you must use the audio connectors on the
audio adapter.
• Ensure that the program you are running is designed for use in the
Microsoft Windows operating system. If the program is designed to
run in DOS, the program does not use the Windows sound feature.
The program must be configured to use SoundBlaster Pro or
SoundBlaster emulation.
• Ensure that the audio device drivers are correctly installed.
The sound does not come from the headset
or headphones.
Select the headset or headphones as the default audio output device
in advanced sound settings.
The sound comes from one of the external
speakers.
• Ensure that the speaker cable is inserted completely into the
connector on the computer.
• Ensure that the cable that connects the left speaker to the right
speaker is securely connected.
• Ensure that the balance settings are set correctly.
1. Right-click the volume icon in the Windows notification area
on the taskbar. Then, click Open Volume Mixer and select the
desired speaker.
2. Click the speaker icon on top of the volume control, and then
click the Levels tab.
Network problems
Note: The Wi-Fi and Bluetooth features are optional.
Chapter 6.Troubleshooting, diagnostics, and recovery 47
Problem Solution
The computer cannot connect to an Ethernet
LAN.
• Connect the cable from the Ethernet connector to the RJ45
connector of the hub.
• Enable the Ethernet LAN feature in UEFI BIOS.
• Enable the Ethernet LAN adapter.
1. Go to Control Panel and view by large icons or small icons.
2. Click Network and Sharing Center ➙ Change adapter
settings.
3. Right-click the Ethernet LAN adapter icon and click Enable.
• Update or reinstall the Ethernet LAN driver.
• Install all networking software that is necessary for your network
environment. Check with your LAN administrator for the necessary
networking software.
• Set the same duplex for the switch port and the adapter. If you
configured the adapter for full duplex, ensure that the switch port is
also configured for full duplex. Setting a wrong duplex mode might
degrade performance, cause data loss, or result in lost
connections.
When a Gigabit Ethernet model computer is
used at a speed of 1000 Mbps, the Ethernet
LAN connection fails or errors occur.
Connect the network cable to the Ethernet connector using Category
5 wiring and a 100 BASE-T hub/switch (not 100 BASE-X).
The Wake On LAN (WOL) feature does not
work. Enable the Wake On LAN feature in UEFI BIOS.
The Wi-Fi feature does not work.
• Enable the Wi-Fi feature in UEFI BIOS.
• Enable all Wi-Fi devices.
1. Right-click the Start button to open the Start context menu.
2. Click Device Manager. Type the administrator password or
provide confirmation, if prompted.
3. Expand Network adapters to display all network devices.
4. Right-click each Wi-Fi device, and then click Enable device.
• Enable the Wi-Fi feature in Windows Settings.
1. Open the Start menu.
2. Click Settings ➙ Network & Internet ➙ Wi-Fi.
3. Enable the Wi-Fi feature.
• Update or reinstall the Wi-Fi driver.
48 P620 Hardware Maintenance Manual
Problem Solution
The Bluetooth feature does not work.
• Enable the Bluetooth feature in UEFI BIOS.
• Enable all Bluetooth devices.
1. Right-click the Start button to open the Start context menu.
2. Click Device Manager. Type the administrator password or
provide confirmation if prompted.
3. Expand Bluetooth to display all Bluetooth devices. Right-click
each Bluetooth device, and then click Enable device.
4. Expand Network adapters to display all network devices.
Right-click each Bluetooth device, and then click Enable
device.
• Turn on the Bluetooth radio.
1. Open the Start menu.
2. Click Settings ➙ Devices ➙ Bluetooth & other devices.
3. Turn on the Bluetooth switch to enable the Bluetooth feature.
• Update or reinstall the Bluetooth driver.
Sound does not come from the Bluetooth
headset or headphones.
Select the Bluetooth headset or headphones as the default audio
output device in advanced sound settings.
Chapter 6.Troubleshooting, diagnostics, and recovery 49
Performance problems
Problem Solution
Excessive fragmented files exist on the
storage drives.
Note: Depending on the volume of the storage drives and amount of
data stored on the storage drives, the disk-defragmentation process
might take up to several hours.
1. Close any open programs and windows.
2. Open the Start menu.
3. Click Windows System ➙ File Explorer ➙ This PC.
4. Right-click your C drive and then click Properties.
5. Click the Tools tab.
6. Click Optimize. Select the drive as desired, and then click
Optimize.
7. Follow the on-screen instructions.
The free storage drive space is insufficient.
• Clean out your Inbox, Sent Items, and Deleted Items folders from
your e-mail application.
• Clean up your C drive.
1. Open the Start menu.
2. Click Windows System ➙ File Explorer ➙ This PC.
3. Right-click your C drive and then click Properties.
4. Check the amount of free space, and then click Disk Cleanup.
5. A list of unnecessary file categories is displayed. Select the
category you want to delete, and then click OK.
• Disable some Windows features or remove some unnecessary
programs.
1. Go to Control Panel and view by large icons or small icons.
2. Click Programs and Features.
3. Do one of the following:
– To disable some Windows features, click Turn Windows
features on or off. Follow the on-screen instructions.
– To remove some unnecessary programs, select the
program you want to remove, and then click Uninstall/
Change or Uninstall.
The free memory space is insufficient.
• Right-click a blank area on the taskbar and open Task Manager.
Then, end some tasks you are not performing.
• Install additional memory modules.
50 P620 Hardware Maintenance Manual
Storage drive problems
Problem Solution
Some or all storage drives are missing from
the BIOS menu.
• Ensure that the signal cables and power cables for all the storage
drives are connected correctly.
• Ensure that the computer is configured correctly to support the
storage drives.
– If the computer is installed with SATA storage drives, ensure
that the SATA storage drive enablement module (one to five
storage drives) is installed.
– If the computer is installed with SAS storage drives, ensure that
the SAS storage drive enablement module (one to five storage
drives) or the LSI MegaRAID SAS adapter is installed.
CD or DVD problems
Problem Solution
A CD or DVD does not work.
• Ensure that the optical drive supports the CD or DVD.
• Ensure that the disc is inserted correctly, with its label up.
• Ensure that the disc you are using is clean. To remove dust or
fingerprints, wipe the disc clean with a soft cloth from the center to
the outside. Wiping a disc in a circular motion might cause loss of
data.
• Ensure that the power cable and signal cable are securely
connected to the drive.
• Ensure that the disc you are using is not scratched or damaged.
Try inserting another disc that you know works.
• If you have multiple CD or DVD drives installed (or a combination of
CD and DVD drives), try inserting the disc into the other drive. In
some cases, only one of the drives is connected to the audio
subsystem.
A bootable recovery medium, such as the
Product Recovery CD, cannot be used to
start your computer.
Ensure that the CD or DVD drive is set as the top priority of the boot
priority order in UEFI BIOS.
Note: On some computer models, the startup sequence is
permanently set and cannot be changed.
A black screen is displayed instead of the
DVD video.
• Restart the DVD player program.
• Try a lower screen resolution or color depth.
• Close any open files, and then restart the computer.
A DVD movie does not play.
• Ensure that the disc surface is clean and not scratched.
• Check the disc or packaging for regional coding. You might need
to purchase a disc with coding for the region where you are using
the computer.
No audio or only an intermittent audio comes
out while a DVD movie is playing.
• Check the volume control settings on the computer and on your
speakers.
• Ensure that the disc surface is clean and not scratched.
• Check all cable connections to and from the speakers.
• Use the DVD menu for the video to select a different audio track.
Chapter 6.Troubleshooting, diagnostics, and recovery 51
Problem Solution
The playback is slow or choppy. • Disable any background programs, such as AntiVirus or Desktop
Themes.
• Ensure that video resolution is less than 1152 x 864 pixels.
A message indicating invalid disc or no disc
found is displayed.
• Ensure that the disc is in the drive with the shiny side of the disc
facing down.
• Ensure that video resolution is less than 1152 x 864 pixels.
• Ensure that the DVD or CD is inserted into an appropriate optical
drive. For example, do not insert a DVD into a CD-only drive.
Serial connector problems
Problem Solution
The serial connector cannot be accessed.
• Connect the serial cable from the serial connector on the computer
to the serial device. If the serial device has its own power cord,
connect the power cord to a grounded electrical outlet.
• Turn on the serial device and keep the device online.
• Install any programs supplied with the serial device. Refer to the
documentation that comes with the serial device for more
information.
• If you added one serial-connector adapter, ensure that the adapter
is installed correctly.
USB device problems
Problem Solution
A USB device cannot be accessed.
• Connect the USB cable from the USB connector to the USB
device. If the USB device has its own power cord, connect the
power cord to a grounded electrical outlet.
• Turn on the USB device and keep the device online.
• Install any device drivers or programs supplied with the USB
device. Refer to the documentation that comes with the USB
device for more information.
• Disconnect and reconnect the USB connector to reset the USB
device.
• Ensure that the Smart USB Protection function is disabled in UEFI
BIOS.
52 P620 Hardware Maintenance Manual
Software problems
Problem Solution
Some programs do not work as expected.
1. Check whether the problem is caused by a program.
a. Ensure that the software is compatible with the computer.
Refer to the information supplied with the software for more
information.
b. Verify that other software works correctly on the computer.
c. Verify that the software you are using works on another
computer.
2. If the problem is caused by a program:
• Refer to the printed documentation that comes with the
program or the help system of the program.
• Update the program.
• Uninstall the program and then reinstall it. To download a
program that is preinstalled on your computer, go to https://
pcsupport.lenovo.com and follow the on-screen instructions.
Diagnostics
Use diagnostic solutions to test hardware components and report operating-system-controlled settings that
interfere with the correct operation of your computer.
Lenovo diagnostic tools
This section introduces a set of Lenovo diagnostic tools. Choose an appropriate tool depending on whether
an error code or error message is displayed:
An error message pops up in the Windows notification area, an error code is displayed on the four-digit
diagnostic display (for selected models) on the front panel, or the diagnostic indicator on the front panel turns
on:
• If a diagnostic program can be launched properly:
– Use “ThinkStation Diagnostics” on page 53.
– Record the error code displayed on the four-digit diagnostic display (for selected models) or in
ThinkStation Diagnostics, and then decode the error at https://www.thinkworkstationsoftware.com/
codes.
• If your computer does not function:
– Use “Lenovo PC Diagnostics” on page 54.
– Record the error code displayed on the four-digit diagnostic display (for selected models) or on your
smartphone with Lenovo PC Diagnostics installed, and then decode the error at https://
www.thinkworkstationsoftware.com/codes.
For more information, go to:
• https://pcsupport.lenovo.com/lenovodiagnosticsolutions
• https://www.thinkworkstationsoftware.com/diags
ThinkStation Diagnostics
You can download ThinkStation Diagnostics at:
Chapter 6.Troubleshooting, diagnostics, and recovery 53
https://pcsupport.lenovo.com/lenovodiagnosticsolutions/downloads
To diagnose problems with ThinkStation Diagnostics:
1. When an error message pops up in the Windows notification area, click the error message or the
ThinkStation Diagnostics icon to launch the program.
2. All events are logged locally in the program. Locate the related event and view the event log to find
possible solutions.
If you want to disable ThinkStation Diagnostics, uninstall it directly.
Lenovo PC Diagnostics
Lenovo PC Diagnostics is an app installed on your smartphone to decode beep errors when an error with
beeps is emitted from your computers. To diagnose problems with Lenovo PC Diagnostics:
1. Download Lenovo PC Diagnostics from app stores or the Le Store Web site and install it on your
smartphone:
• Le Store or Google Play Store (Android)
• iTunes App Store (iOS)
• Le Store Web site https://www.lenovomm.com/appdetail/com.lenovo.lenovoworkstationdiagnostics/85
2. When an error code is displayed on the four-digit diagnostic display (for selected models) on the front
panel or the diagnostic indicator on the front panel turns on, launch the app and place your smartphone
near the computer.
3. Press Fn on your computer to emit the beep again. The app decodes the beep error and shows possible
solutions on the smartphone.
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 45. 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:
54 P620 Hardware Maintenance Manual
Table 1. Options on the main screen of the UEFI diagnostic program
DIAGNOSTICS TOOLS
• CPU [U]
• DISPLAY [D]
• KEYBOARD [K]
• MEMORY [E]
• MOTHERBOARD [H]
• MOUSE [W]
• PCI EXPRESS [P]
• STORAGE [S]
• 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.
Recovery
This section introduces the recovery information of the Windows 10 operating system. Ensure that you read
and follow the on-screen recovery instructions. The data on your computer might be deleted during the
recovery process. To avoid data loss, make a backup copy of all the data that you want to keep.
Restore system files and settings to an earlier point
1. Go to Control Panel and view by large icons or small icons.
2. Click Recovery ➙ Open System Restore. Then, follow the on-screen instructions.
Restore your files from a backup
Note: If you use the File History tool to restore your files from a backup, ensure that you backed up your
data earlier with the tool.
1. Go to Control Panel and view by large icons or small icons.
2. Click File History ➙ Restore personal files. Then, follow the on-screen instructions.
Reset your computer
In the resetting process, you can choose to keep your files or remove them when you reinstall the operating
system.
Note: The items in the graphical user interface (GUI) might change without notice.
1. Open the Start menu, and then click Settings ➙ Update & Security ➙ Recovery.
2. In the Reset this PC section, click Get started.
3. Follow the on-screen instructions to reset your computer.
Use advanced options
1. Open the Start menu, and then click Settings ➙ Update & security ➙ Recovery.
2. In the Advanced startup section, click Restart now ➙ Troubleshoot ➙ Advanced options.
3. Select a preferred option, and then follow the on-screen instructions.
Chapter 6.Troubleshooting, diagnostics, and recovery 55
Windows automatic recovery
Note: Ensure that your computer is connected to ac power during the recovery process.
The Windows recovery environment on your computer operates independently from the Windows 10
operating system. It enables you to recover or repair the operating system even if the Windows 10 operating
system fails to start.
After two consecutive failed boot attempts, the Windows recovery environment starts automatically. Then,
you can choose repair and recovery options by following the on-screen instructions.
Create and use a recovery USB device
It is recommended that you create a recovery USB drive as early as possible as a backup for the Windows
recovery programs. With the recovery USB drive, you can troubleshoot and fix the problems even if the
preinstalled Windows recovery programs are damaged. If you did not create a recovery USB drive as a
precautionary measure, you can contact Lenovo Customer Support Center and purchase one from Lenovo.
For a list of the Lenovo Support phone numbers for your country or region, go to:
https://pcsupport.lenovo.com/supportphonelist
Create a recovery USB drive
Attention: The creation process deletes anything stored on the USB drive. To avoid data loss, make a
backup copy of all the data that you want to keep.
1. Ensure that your computer is connected to ac power.
2. Prepare a USB drive with capacity of at least 16 GB. The actual USB capacity required depends on the
size of the recovery image.
3. Connect the prepared USB drive to the computer.
4. Type recovery in the search box. Then, click Create a recovery drive.
5. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.
6. In the Recovery Drive window, follow the on-screen instructions to create a recovery USB drive.
Use the recovery USB drive
If your computer cannot be started, go to https://pcsupport.lenovo.com/supportphonelist first to try to solve
the problem by yourself. If the problem persists, use the recovery USB drive to recover your computer.
1. Ensure that your computer is connected to ac power.
2. Connect the recovery USB drive to the computer.
3. Turn on or restart the computer. When the logo screen is displayed, press F12. The Boot Menu window
opens.
4. Select the recovery USB drive as the boot device. Then, follow the on-screen instructions to complete
the process.
Update the device driver
Attention: Reinstalling device drivers will change the current configuration of the computer.
You should download the latest driver for a component when you notice poor performance from that
component or when you added a component. This action might eliminate the driver as the potential cause of
a problem. Download and install the latest driver by one of the following methods:
• From the Vantage app:
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Open the Vantage app to check the available update packages. If the latest UEFI BIOS update package is
available, follow the on-screen instructions to download and install the package.
• From the Lenovo Support Web site:
Go to https://pcsupport.lenovo.com and select the entry for your computer. Then, follow the on-screen
instructions to download and install necessary drivers and software.
• From Windows Update:
Note: The device drivers provided by Windows Update might not be tested by Lenovo. It is
recommended that you get device drivers from Lenovo.
1. Open the Start menu.
2. Click Settings ➙ Update & Security ➙ Windows Update.
3. Follow the on-screen instructions.
Chapter 6.Troubleshooting, diagnostics, and recovery 57
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Chapter 7. 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 Tool type
1 Phillips-head screwdriver Common tool
2 Torx-head screwdriver Common tool
3 Pry tools Common tool
4Conductive tweezers Common tool
5Isolated tweezers Common tool
6 Hexagonal socket Common tool
7Silicone grease Consumable tool
8 Polyamide tape Consumable tool
9 Mylar tape Consumable tool
10 Eraser Consumable tool
11 Electrical tape Consumable tool
12 Double-sided tape Consumable tool
13 Conductive tape Consumable tool
© Copyright Lenovo 2020, 2021 59
Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air
gaps. The hexagonal socket is used to pick up the antenna connectors.
Major FRUs and CRUs
Your computer contains the following types of CRUs and FRUs:
• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by
trained service technicians at an additional cost.
• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill
level. Trained service technicians can also provide service to install or replace the parts under the type of
warranty designated for the customer’s machine.
• FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers
choose to replace the FRUs by themselves, the product warranty might be affected.
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Number Description Self-service CRU Optional-service CRU
5Front access storage enclosure* Yes No
6Flex module* Yes No
7ID badge Yes No
815-in-1 card reader* No No
9Slim optical drive* Yes No
10 Slim optical drive bracket* Yes No
11 Storage drive power cable No No
12 Storage drive signal cable No No
13 Slim optical drive power cable No No
14 Slim optical drive signal cable No No
15 Front fan assembly Yes No
16 Storage drive cage* Yes No
17 Hard disk drive Yes No
18 Computer cover Yes No
19 Power supply assembly Yes No
20 M.2 solid-state drive heat sink (available on some
models)
No Yes
21 M.2 solid-state drive* No Yes
22 Memory cooler and duct No Yes
23 Graphics card* No Yes
24 Wi-Fi adapter* No Yes
25 PCIe card* No Yes
26 Cover presence switch (intrusion switch) Yes No
27 Wi-Fi card* No Yes
28 Lock kit* No No
29 Rear fan assembly No Yes
30 Graphics card dongle* No Yes
31 Wi-Fi antenna* No Yes
32 Serial COM cable No No
33 Microprocessor No No
34 Mechanical chassis No No
35 Coin-cell battery No Yes
36 Memory modules Yes No
37 System board No No
aLenovo factory recovery USB key (available on
some models)
No No
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Number Description Self-service CRU Optional-service CRU
bLenovo recovery disc set (available on some
models)
No No
cMiscellaneous parts kits No No
dMiscellaneous cables No No
eMouse* Yes No
fKeyboard* Yes No
gPower cord Yes No
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
Note: The system board might look slightly different from the illustration.
Chapter 7.Hardware removal and installation 63
Figure 1. System board part locations
1 Cover presence switch connector (intrusion switch
connector)
2 Memory fan connector 1
3 Optical-drive fan connector 2 4 4-pin power connector (for optical drive)
5 Memory slot 1 6 Memory slot 2
7 Memory slot 3 8 Memory slot 4
9 Optical-drive fan connector 10 Thermal-sensor connector
11 Microprocessor fan connector 1 12 Microprocessor
13 Microprocessor fan connector 2 14 Front input/output connector
15 Memory slot 5 16 Memory slot 6
17 Memory slot 7 18 Memory slot 8
19 M.2 solid-state drive slot 1 20 M.2 solid-state drive slot 2
21 Coin-cell battery 22 4-pin power connector (for storage drive)
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23 8-pin power connector (for graphics card) 24 8-pin power connector (for graphics card)
25 /25a Front-fan-assembly connector 26 eSATA / SATA 6 connector
27 SATA 4 connector 28 SATA 2 connector
29 SATA 1 connector 30 SATA 3 connector
31 SATA 5 connector 32 Media card reader (MCR) header
33 Internal USB 3.2 Gen 2 connector 34 Alternative Trusted Platform Module (TPM) header
35 Thunderbolt™ control connector 36 Power supply connector
37 Internal-storage-drive activity indicator connector 38 Internal USB 2.0 connector
39 PCIe 4.0 x8 card slot 6 40 PCIe 4.0 x16 card slot 5
41 PCIe 4.0 x16 card slot 4 42 PCIe 4.0 x16 card slot 3
43 Clear CMOS / Recovery jumper 44 PCIe 4.0 x8 card slot 2
45 PCIe 4.0 x 16 card slot 1 46 /46a Memory fan connector 2
47 Rear-fan-assembly connector 48 Serial port (COM) connector
Chapter 7.Hardware removal and installation 65
Internal storage drives
Internal storage drives are devices that your computer uses to read and store data. You can add drives to
your computer to increase storage capacity and enable your computer to read other types of media.
1. M.2 solid-state drive slots One or two M.2 solid-state drives are installed in selected models.
2. Flex bay
Depending on your computer model, the following devices might be installed in
the flex bay:
• Flex module
Depending on your computer model, the following parts might be installed in
the flex module:
– 15-in-1 card reader
– Slim optical drive
• Front-access storage enclosure
• Multi-drive conversion kit
Depending on your computer model, the following parts might be installed in
the multi-drive conversion kit:
– Internal storage drive
– Slim optical drive
• Slim-optical-drive adapter
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3. Storage drive bays*
You can install hard disk drives in the storage drive bays.
Note: If you want to install storage drives into the optional-storage-drive bays,
contact the Lenovo Customer Support Center for help.
4. Storage drive bays You can install hard disk drives in the storage drive bays.
5. PCIe slots You can install compatible PCIe cards and PCIe solid-state drives in the PCIe card
slots.
* for selected models
Removing and installing hardware
This section provides instructions on how to remove and install hardware for your computer. You can expand
the capabilities of your computer and maintain your computer by removing or installing hardware.
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Important safety information” 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.
ID badge
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Chapter 7.Hardware removal and installation 67
Removal steps
Computer cover
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Before you open the computer cover, turn off the computer and wait several minutes until the computer is
cool.
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.
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Note: If a locking device is available, use it to lock the computer.
Serial COM cable
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several
minutes until the computer is cool.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Disconnect the serial COM cable from serial port (COM) connector on the system board.
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Removal steps
Device in the flex bay
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
The flex bay of your computer supports the following devices:
• Flex module
• Front-access storage enclosure
• Multi-drive conversion kit
• Slim-optical-drive adapter
Note: The following instructions on how to remove or install a slim-optical-drive adapter also apply to other
supported devices in the flex bay.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Locate the flex bay. See “Internal storage drives” on page 66.
3. Disconnect the signal cable and the power cable from the rear of the slim optical drive.
Note: If you are removing other supported devices from the flex bay, disconnect any additional cables
first.
Replacement steps
1. Remove the slim-optical-drive adapter.
Chapter 7.Hardware removal and installation 73
2. Remove the slim optical drive from the failing adapter and install the slim optical drive into the new
adapter. See “Device in the multi-drive conversion kit” on page 78..
3. If you are installing a slim-optical-drive adapter into the flex bay with a plastic shield installed, press the
clip as shown to remove the plastic shield. If there is a metal static shield installed in the flex bay, remove
the metal static shield.
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Storage drive in the front-access storage enclosure
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 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 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.
You can install or replace a storage drive in the front-access storage enclosure. The storage drive also can
be hot-swappable, which means that you can install or replace the drive without even turning off your
computer. Therefore, lock the enclosure cover to prevent the unexpected removal. The keys are attached at
the rear of the computer. Store the keys in a secure place.
The storage drive in the front-access storage enclosure is hot-swappable only when the following
requirements are met:
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• The SATA cable of the front-access storage enclosure is connected to the eSATA connector on the
system board. To verify the cable connection, see “System board” on page 63 for more information.
• The operating system of your computer does not reside on the storage drive installed in the front-access
storage enclosure.
Attention: If any of the above requirements are not met, do not remove or install the storage drive when the
computer is turned on. Otherwise, data on the storage drive might get damaged.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Locate the flex bay. See “Internal storage drives” on page 66.
3. Before removing an old 3.5-inch storage drive, safely eject the old storage drive from the operating
system first. For more information, see the operating system help system.
Replacement steps
Chapter 7.Hardware removal and installation 77
Notes:
• Ensure that the circuit board faces downward and the connectors face toward the rear of the bracket.
• Do not touch the circuit board on the storage drive during operation.
Device in the multi-drive conversion kit
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
The multi-drive conversion kit (hereafter referred to as kit) might be equipped with either one or both of the
following components:
• Slim optical drive
• Storage drive
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Ensure that all the cables are disconnected from the kit. Remove the kit from the front of the computer.
See “Device in the flex bay” on page 73.
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Replacement steps for the 3.5-inch storage drive
To install a 3.5-inch storage drive, ensure that the conversion bracket is unfolded. To unfold the bracket:
1. Remove pins 1 and install them into slots 2.
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Device in the flex module
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
The flex module might be equipped with either one or both of the following components:
• Slim optical drive
• 15-in-1 card reader
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Ensure that all the cables are disconnected from the flex module. Remove the flex module from the front
of the computer. See “Device in the flex bay” on page 73.
Chapter 7.Hardware removal and installation 83
Replacement steps for the slim optical drive
If no slim optical drive has been installed in the flex module before, press the two metal clips 1 to remove the
plastic clip with the two screws as shown. Remove the two screws.
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Front panel I/O cage
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the front panel I/O cage.
Replacement steps
Chapter 7.Hardware removal and installation 87
Cover presence switch
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Disconnect the cover presence switch cable from the system board. See “System board” on page 63.
Removal steps
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Front fan assembly
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury,
seek medical care immediately.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Remove the following devices if any:
• Full-length PCIe cards, see “Full-length PCIe card” on page 106
• PCIe card retainer, see “PCIe card” on page 103
Replacement steps
1. Remove the front fan assembly.
Note: When you slide out the front fan assembly, avoid pulling the front-fan-assembly cable.
2. Disconnect the front-fan-assembly cable from the front-fan-assembly connector on the system board.
3. Connect the cable of the new front fan assembly to the front-fan-assembly connector on the system
board. See “System board” on page 63.
4. Install a new front fan assembly.
Chapter 7.Hardware removal and installation 89
Storage drive in a storage drive bay
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 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 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, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Locate the storage drive bay. See “Internal storage drives” on page 66.
3. Disconnect all the cables from the storage drive.
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3. Unfold the bracket as shown.
4. Insert tabs 1, 2, and 3 into the corresponding slots. Ensure that the tabs are secured in place.
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Storage drive cage
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Your computer might come with an optional storage drive cage.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Remove the front fan assembly. See “Front fan assembly” on page 89.
3. Locate the storage drive cage. See “Internal storage drives” on page 66..
4. Remove the storage drives out of the storage drive cage. See “Storage drive in a storage drive bay” on
page 90.
Chapter 7.Hardware removal and installation 93
Replacement steps
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M.2 solid-state drive
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 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 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.
An M.2 solid-state drive can be installed on the system board or on an M.2 solid-state drive PCIe adapter.
M.2 solid-state drive on the system board
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the M.2 solid-state drive slots.
3. Locate the M.2 solid-state drive. See “Internal storage drives” on page 66.
4. Remove the memory cooler and duct. See “Internal storage drives” on page 66.
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M.2 solid-state drive in an M.2 solid-state drive PCIe adapter
Install M.2 solid-state drives in the alphabetic order as shown.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Remove the M.2 solid-state drive PCIe adapter from the PCIe card slot. See “Full-length PCIe card” on
page 106.
Replacement steps
Chapter 7.Hardware removal and installation 99
If necessary, move the retention latch to an appropriate location to suit the length of the new M.2 solid-state
drive.
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Power supply assembly
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 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.
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 the computer cover. See “Computer cover” on page 68.
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Removal steps
PCIe card
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Install PCIe cards according to the corresponding slot types and the following illustrated installation order:
Chapter 7.Hardware removal and installation 103
Figure 2. PCIe card installation order
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Remove the power cable from the PCIe card, if any.
Removal steps
Note: The PCIe card retainer is only available on some models.
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Full-length PCIe card
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Disconnect the power cable from the full-length PCIe card. Then, remove the card.
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Rear fan assembly
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury,
seek medical care immediately.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Disconnect the rear-fan-assembly cable from the rear-fan-assembly connector on the system board.
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Memory module active cooler and duct
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
Replacement steps
Memory module
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
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Your computer has eight slots for installing DDR4 RDIMMs that provide up to a maximum of 512 GB system
memory. When removing or installing a memory module, use the following guidelines:
• Use 16 GB, 32 GB, or 64 GB DDR4 ECC RDIMMs in any combination up to a maximum of 512 GB.
• Ensure that you follow the installation order for memory modules shown in the following table.
Memory modules Installation order
one Slot 7
two Slot 7 and slot 8
Four Slot 7, slot 8, slot 2, and slot 1
Eight Slot 1 to slot 8
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Remove the memory cooler and duct. See “Memory module active cooler and duct” on page 110.
Replacement steps
Chapter 7.Hardware removal and installation 111
Coin-cell battery
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel connector assignments (configurations). A coin-cell battery keeps this information active
when you turn off the computer.
The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell
battery lasts forever. If the coin-cell battery fails, the date and time information is lost. An error message is
displayed when you turn on the computer.
For access, remove the computer cover. See “Computer cover” on page 68.
Replacement steps
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To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” in the Safety and Warranty
Guide.
Wi-Fi units
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
The Wi-Fi units include a Wi-Fi adapter, a Wi-Fi card, and a Wi-Fi antenna.
For access, remove the computer cover. See “Computer cover” on page 68.
Removal steps
If your computer comes with a Wi-Fi card that supports the Bluetooth function, disconnect the Bluetooth
cable from the Wi-Fi adapter.
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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.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Disconnect the heat-sink-and-fan-assembly cable from the microprocessor fan connector on the
system board.
Removal steps
Loosen the four screws that secure the heat-sink-and-fan assembly to the system board in diagonal
sequence. For example,
1. Partially remove screw 1a , then fully remove screw 1b , and then fully remove screw 1a .
2. Partially remove screw 1c , then fully remove screw 1d , and then fully remove screw 1c .
Notes:
• The four screws cannot be removed from the heat-sink-and-fan assembly.
• You might have to gently twist the heat-sink-and-fan assembly to free it from the microprocessor.
• Place the heat sink and fan assembly on its side. Ensure that the thermal grease on the bottom of it does
not get in contact with anything.
Microprocessor
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
Chapter 7.Hardware removal and installation 117
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.
Notes:
• Ensure that you install the correct type of microprocessor option your computer supports.
• Your microprocessor, socket, and socket cover might look slightly different from the illustrations in this
topic.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Remove the heat-sink-and-fan assembly. See “Heat-sink-and-fan assembly” on page 116.
Replacement steps
Notes:
• Your microprocessor and socket might look different from the one illustrated.
• 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.
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120 P620 Hardware Maintenance Manual
System board
Prerequisite
Before you start, read Chapter 1 “Important safety information” on page 1 and print the following
instructions.
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.
For access, do the following:
1. Remove the computer cover. See “Computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Remove the following parts if any:
• “Front panel I/O cage” on page 87
• “PCIe card” on page 103
• “Full-length PCIe card” on page 106
• “M.2 solid-state drive” on page 96
• “Power supply assembly” on page 102
• “Memory module active cooler and duct” on page 110
• “Memory module” on page 110
• “Coin-cell battery” on page 112
• “Wi-Fi units” on page 114
• “Heat-sink-and-fan assembly” on page 116.
• “Microprocessor” on page 117.
4. Record the cable routing and cable connections and then disconnect all cables from the system board.
See “System board” on page 63.
Chapter 7.Hardware removal and installation 121
Removal steps
1. Remove the 11 screws that secure the system board in the sequence shown in the following illustration.
2. Slide the system board to the front of the computer and then carefully lift the system board out of the
chassis.
The failing system board must be returned with a microprocessor socket cover to protect the pins during
shipping and handling. Install the microprocessor socket covers removed from the new system board on the
failing system board.
To install the microprocessor socket cover, do the following:
Note: Your microprocessor socket and cover might look slightly different from the illustration.
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124 P620 Hardware Maintenance Manual
Appendix A. 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.
© Copyright Lenovo 2020, 2021 125
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
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, THINKSTATION, and THINKSTATION logo are trademarks of Lenovo. Microsoft,
Windows, Direct3D, and Cortana are trademarks of the Microsoft group of companies. Wi-Fi and Miracast
are registered trademarks of Wi-Fi Alliance. Linux is a registered trademark of Linus Torvalds. Ubuntu is a
registered trademark of Canonical Ltd. USB-C is a registered trademark of USB Implementers Forum. All
other trademarks are the property of their respective owners. © 2020 Lenovo.
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