Lenovo ThinkCentre neo 50t Gen 3 Owner's manual

neo 50t Gen 3 Hardware
Maintenance Manual

First Edition (December 2021)
© Copyright Lenovo 2021.
LIMITED AND RESTRICTED RIGHTS N TICE: 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 sa ety
in ormation . . . . . . . . . . . . . . . . 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
in ormation . . . . . . . . . . . . . . . 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 CT , special-bid,
and standard models. . . . . . . . . . . . . 28
Product definition . . . . . . . . . . . . 28
FRU identification . . . . . . . . . . . . 28
Chapter 3. Product overview . . . . . 29
Front . . . . . . . . . . . . . . . . . . . 29
Rear . . . . . . . . . . . . . . . . . . . 30
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 31
Service checkout . . . . . . . . . . . . . . 31
Problem determination tips . . . . . . . . 31
Symptom-to-FRU index . . . . . . . . . . . 32
Hard disk drive boot error . . . . . . . . . 32
Power supply problems . . . . . . . . . . 33
Beep symptoms . . . . . . . . . . . . . 33
P ST error codes . . . . . . . . . . . . 34
Miscellaneous error conditions . . . . . . . 35
Undetermined problems . . . . . . . . . 36
Chapter 5. Hardware removal and
installation . . . . . . . . . . . . . . . 39
Handling static-sensitive devices . . . . . . . . 39
Service tool kit . . . . . . . . . . . . . . . 39
Major FRUs and CRUs . . . . . . . . . . . . 40
System board . . . . . . . . . . . . . . . 43
Removing and installing hardware . . . . . . . 43
External options . . . . . . . . . . . . . 44
Computer cover . . . . . . . . . . . . . 44
Front bezel . . . . . . . . . . . . . . . 44
ptical drive . . . . . . . . . . . . . . 45
Drive bay assembly . . . . . . . . . . . 47
Hard disk drive . . . . . . . . . . . . . 48
Memory module . . . . . . . . . . . . . 49
Coin-cell battery. . . . . . . . . . . . . 50
PCI Express card . . . . . . . . . . . . 51
M.2 solid-state drive and the heat sink . . . . 52
M.2 solid-state drive bracket . . . . . . . . 55
Power supply assembly . . . . . . . . . . 56
Wi-Fi card . . . . . . . . . . . . . . . 57
Internal speaker . . . . . . . . . . . . . 58
Thermal sensor . . . . . . . . . . . . . 59
Front fan . . . . . . . . . . . . . . . . 60
Rear fan . . . . . . . . . . . . . . . . 61
Front Wi-Fi antenna and cable . . . . . . . 62
Rear Wi-Fi antenna and cable . . . . . . . 62
Front I/ bracket and card reader . . . . . . 63
Heat sink and fan assembly . . . . . . . . 65
Microprocessor . . . . . . . . . . . . . 66
System board. . . . . . . . . . . . . . 67
Chapter 6. Notices and
trademarks. . . . . . . . . . . . . . . 71
© Copyright Lenovo 2021 i

About this manual
This manual provides service and reference information for Lenovo® 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 Lenovo
computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Before servicing a Lenovo computer, be sure to read and understand Chapter 1 “Important safety
information” on page 1.

Chapter 1. Important sa ety in ormation
General sa ety
Follow these rules to ensure general safety:
• bserve 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 ingers and other parts o your body away rom hazardous, moving parts. I you su er 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. Be ore you open the computer cover, turn o the computer,
disconnect power, and wait approximately 10 minutes or the components to cool.
© Copyright Lenovo 2021 1

Electrical sa ety
CAUTION:
Electrical current rom 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 be ore you open the computer covers, unless instructed otherwise
in the installation and con iguration procedures.
bserve 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 (EP ) 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.
bserve 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.
2ThinkCentre neo 50t Gen 3 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.
Sa ety 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
Pseudo topic: DITA topic "file:/C:/Users/lexie.guo/ neDrive%20-%20Lionbridge%20Technologies,%20Inc/
+Projects/EX_ThinkCentre%20neo50t/3_HMM/Source/ThinkCentre%20neo50t_20211022_Ann/ThinkCentre
%20neo50t_20211022/Consumer%20DT%20HMM%20template/Handling%20electrostatic%20discharge-
sensitive%20devices%20(topic)_T0000699564.xml" could not be parsed.
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.
Sa ety notices (multi-lingual translations)
The caution and danger safety notices in this section are provided in the following languages:
• English
• Arabic
• Brazilian/Portuguese
• Chinese (simplified)
• Chinese (traditional)
• French
• German
• Hebrew
• Italian
• Korean
• 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 per orm installation, maintenance, or recon iguration
o 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 o ire, water, or structural damage.
4ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual

• Disconnect the attached power cords, telecommunications systems, networks, and modems
be ore you open the device covers, unless instructed otherwise in the installation and con iguration
procedures.
• Connect and disconnect cables as described in the ollowing tables when installing, moving, or
opening covers on this product or attached devices.
To Connect To Disconnect
1. Turn everything FF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device N.
1. Turn everything FF.
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 manu acturer. I your system has a module containing a lithium battery, replace
it only with the same module type made by the same manu acturer. The battery contains lithium and
can explode i not properly used, handled, or disposed o . Do not:
• Throw or immerse into water
• Heat to more than 100°C (212°F)
• Repair or disassemble
Dispose o the battery as required by local ordinances or regulations.
CAUTION:
When laser products (such as CD-ROMs, DVD-ROM drives, iber optic devices, or transmitters) are
installed, note the ollowing:
• Do not remove the covers. Removing the covers o the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• Use o controls or adjustments or per ormance o procedures other than those speci ied herein
might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the ollowing:
Laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.
Chapter 1.Important safety information 5

≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb)
CAUTION:
Use sa e practices when li ting.
CAUTION:
The power control button on the device and the power switch on the power supply do not turn o the
electrical current supplied to the device. The device also might have more than one power cord. To
remove all electrical current rom the device, ensure that all power cords are disconnected rom the
power source.
1
2
6ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual

Chapter 1.Important safety information 7

≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb)
1
2
8ThinkCentre neo 50t Gen 3 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 abricante. A bateria contém lítio e
pode explodir se não or 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-R Ms, unidades de DVD-R M, 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. bserve 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:
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. 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.
1
2
10 ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual

Chapter 1.Important safety information 11

1
2
12 ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual

Chapter 1.Important safety information 13

1
2
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 ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual

Connexion Déconnexion
1. Mettez les unités H RS TENSI N.
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 S US TENSI N.
1. Mettez les unités H RS TENSI N.
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 ré érence identique exclusivement, (ré érence
45C1566), ou suivre les instructions du abricant qui en dé init 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 abricant. 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 ibres optiques, ou
des émetteurs) sont installés, prenez connaissance des in ormations 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 in ormations suivantes:
Rayonnement laser lorsque le carter est ouvert. Evitez toute expositiondirecte au rayon laser. Evitez
de regarder ixement le aisceau 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.
1
2
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 Rekon igurationsarbeiten durch ühren.
• Gerät nur an eine Schutzkontaktsteckdose mit ordnungsgemäß geerdetem Schutzkontakt
anschließen.
• Alle angeschlossenen Geräte eben alls an Schutzkontaktsteckdosen mit ordnungsgemäß
geerdetem Schutzkontakt anschließen.
• Die Signalkabel nach Möglichkeit einhändig anschließen oder lösen, um einen Stromschlag durch
Berühren von Ober lächen mit unterschiedlichem elektrischem Potenzial zu vermeiden.
• Geräte niemals einschalten, wenn Hinweise au Feuer, Wasser oder Gebäudeschäden vorliegen.
16 ThinkCentre neo 50t Gen 3 Hardware Maintenance Manual