Lenovo F0EL0018RK, F0EL0019RK User Manual

IdeaCentre A540-24ICB and A540-24API
Hardware Maintenance Manual

First Edition (July 2019)

© Copyright Lenovo 2019.

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. GS­35F-05925.

Contents

About this manual . . . . . . . . . . . . iii

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 FRU . . . . . . . . . . 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 . . . . . . . . . . 27

Strategy for replacing FRU for CTO, special-bid,

and standard models. . . . . . . . . . . . . 28

Product definition . . . . . . . . . . . . 28

FRU identification . . . . . . . . . . . . 28

Chapter 3. Product overview . . . . . 29

Front . . . . . . . . . . . . . . . . . . . 29

Rear . . . . . . . . . . . . . . . . . . . 30

Bottom . . . . . . . . . . . . . . . . . . 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. Troubleshooting and

recovery . . . . . . . . . . . . . . . . 41

Basic procedure for resolving computer

problems . . . . . . . . . . . . . . . . . 41

Troubleshooting . . . . . . . . . . . . . . 41

Startup problems . . . . . . . . . . . . 42

Screen problems . . . . . . . . . . . . 43

Audio problems . . . . . . . . . . . . . 44

Network problems . . . . . . . . . . . . 45

Performance problems . . . . . . . . . . 47

Storage drive problems . . . . . . . . . . 48

CD or DVD problems . . . . . . . . . . . 48

Serial connector problems. . . . . . . . . 49

Software problems. . . . . . . . . . . . 49

Recovery . . . . . . . . . . . . . . . . . 49

Restore system files and settings to an earlier

point . . . . . . . . . . . . . . . . . 50

Restore your files from a backup . . . . . . 50

Reset your computer . . . . . . . . . . . 50

Use advanced options . . . . . . . . . . 50

Windows automatic recovery. . . . . . . . 50

Create and use a recovery USB device . . . . 50

Update the device driver . . . . . . . . . 51

Chapter 6. Hardware removal and

installation . . . . . . . . . . . . . . . 53

Handling static-sensitive devices . . . . . . . . 53

Service tool kit . . . . . . . . . . . . . . . 53

Major FRU and CRU . . . . . . . . . . . . . 54

System board . . . . . . . . . . . . . . . 56

Removing and installing hardware . . . . . . . 56

External options . . . . . . . . . . . . . 57

Hinge cover . . . . . . . . . . . . . . 57

Computer back cover. . . . . . . . . . . 58

System board frame . . . . . . . . . . . 62

Memory module . . . . . . . . . . . . . 64

System fan . . . . . . . . . . . . . . . 66

Heat sink . . . . . . . . . . . . . . . 69

Wi-Fi card . . . . . . . . . . . . . . . 71

M.2 SSD . . . . . . . . . . . . . . . . 74

Microprocessor . . . . . . . . . . . . . 78

System board. . . . . . . . . . . . . . 81

Speakers . . . . . . . . . . . . . . . 83

Storage drive . . . . . . . . . . . . . . 86

LCD panel . . . . . . . . . . . . . . . 93

Camera module . . . . . . . . . . . . . 99

Computer upper cover . . . . . . . . . . 104

Power switch board . . . . . . . . . . . 107

Subwoofer . . . . . . . . . . . . . . . 109

Wireless charging module . . . . . . . . . 112

DC-in board . . . . . . . . . . . . . . 116

System stand . . . . . . . . . . . . . . 118

© Copyright Lenovo 2019 i

Chapter 7. Notices and

trademarks. . . . . . . . . . . . . . . 121

ii IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

About this manual

This manual provides service and reference information for IdeaCentre® computers listed on the front cover.

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 IdeaCentre
computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Before servicing a IdeaCentre computer, be sure to read and understand Chapter 2 “Important service
information” on page 27.

© Copyright Lenovo 2019 iii

iv IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

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 2019 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 (FRU)

• 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.

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IdeaCentre A540-24ICB and A540-24API 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 (cathode ray tube) 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

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IdeaCentre A540-24ICB and A540-24API 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:

1

2

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.

6 IdeaCentre A540-24ICB and A540-24API 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

8 IdeaCentre A540-24ICB and A540-24API 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

1

2

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.

10 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 1. Important safety information 11

1

2

12 IdeaCentre A540-24ICB and A540-24API 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.

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IdeaCentre A540-24ICB and A540-24API 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)

1

2

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.

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.

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IdeaCentre A540-24ICB and A540-24API 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

1

2

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.

18 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 1. Important safety information 19

1

2

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

IdeaCentre A540-24ICB and A540-24API 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

1

2

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.

22 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 1. Important safety information 23

1

2

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

IdeaCentre A540-24ICB and A540-24API 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

1

2

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.

26 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 2. Important service information

Strategy for replacing FRU

Before replacing parts:

Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace any FRU
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
the instructions on the screen.

Use the following strategies to prevent unnecessary expense for replacing and servicing FRU:

• 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 FRU might be the cause of the error.
Before replacing the adapter or device, remove the FRU, one by one, to see if the symptoms change.
Replace only the FRU that changed the symptoms.

https://support.lenovo.com and follow

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.

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.

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

© Copyright Lenovo 2019 27

codes. If no error code is displayed, see whether the error symptom is listed in the “Symptom-to-FRU Index”
section.

Strategy for replacing FRU 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 FRU for a product, do the following:

1. Go to:

2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for

https://support.lenovo.com/partslookup

more detailed FRU information.

28

IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 3. Product overview

Front

1. Integrated camera activity indicator

3. Integrated camera* 4. Infrared camera*

5. Screen

7. Internal speakers 8. Wireless charging indicator**

* Either an integrated camera or an infrared camera is provided on your computer.

** for selected models

© Copyright Lenovo 2019 29

2. Integrated microphones (2)

6. Wireless charging pad**

Rear

1. PC/Monitor mode switcher

3. Ethernet connector 4. HDMI 1.4 out connector

5. USB 2.0 connectors (2) 6. USB 3.1 connector Gen 1/Gen 2*

7. 3 in 1 SD card slot 8. USB 3.1 connectors Gen 1/Gen 2* (2)

9. Combo audio jack

11. Power button

2. HDMI 1.4 in connector

10. Power adapter connector

* for A540–24ICB models only

30

IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Bottom

1. Storage drive door* 2. Internal speakers (2)

* for selected models

Chapter 3. Product overview 31

32 IdeaCentre A540-24ICB and A540-24API 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.

• 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 2019 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
FRU 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 IdeaCentre 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 IdeaCentre A540-24ICB and A540-24API 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

Check the following for proper installation.

• Power cord

• On/Off switch connector

• On/Off switch power supply connector

• System board power supply connectors

• Microprocessor connection

Check the power cord for continuity.

Check the power-on switch for continuity. Power-on switch

FRU/Action

Reseat connectors

Power cord

Beep symptoms

Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.

The following table describes the beep symptoms.

Beep symptom

2 short beeps: common POST error Common POST error code. See the detailed failure

3 short and 1 long beeps: DRAM memory error Perform the following actions in order:

FRU/Action

information in “POST error codes” on page 36.

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: insufficient shadow RAM resources for
option ROM (error code: 8998) or PCIe/PCI MMIO
(memory mapped input/output) resources (error code:

8999)

2 long and 3 short beeps: graphics card error Perform the following actions in order:

See the detailed failure information in “POST error codes”
on page 36.

1. Make sure that the graphics cards are properly
seated in the slots.

2. Replace the graphics cards.

3. Replace the system board (for trained service
personnel only).

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

POST error codes

Each time you turn on the system, it performs a series of tests that check the operation of the system and
some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following
operations:

• Some basic system-board operations

• Memory operation

• Video operation

• Whether the boot drive is working

If the POST detects a problem, an error message appears on the screen. A single problem might cause
several error messages to appear. When you correct the cause of the first error message, the other error
messages probably will not appear on the screen the next time.

Error code

0135

0211 Keyboard not found This error message is displayed when

0164 Memory size decreased

1762

1820 More than one external fingerprint

POST error message Description/Action

CPU fan failure
System fan failure
Power fan failure
Front fan failure
Rear fan failure
Auxiliary fan failure
ODD fan failure

SATA device configuration change
has occurred

reader is attached. Turn off and
remove all but the reader that you set
up within your main operating
system.

This error message is displayed
when a fan fails and the system
might be overheating.

Press F10 to exit.

no keyboard is detected.

This error message is displayed
when the memory size is
decreased.

Press F10 to exit.

This error message is displayed
when a hard disk drive change or
an optical drive change has been
made.

Press F10 to exit.

This error message is displayed
when more than one external
fingerprint reader is connected to
the computer.

Turn off and remove all but the
reader that you set up within your
main operating system.

1962 No operating system found. Boot

sequence will automatically repeat.

36 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

This error occurs only after the
POST is completed.

Press any key to repeat boot
sequence.

8998 Not enough shadow RAM resources

for OPTION ROM, not all devices
initialized. Suggest to remove some
add-on cards, or change to UEFI
mode in BIOS setup.

This error message is displayed
when the shadow RAM resources
for option ROM are insufficient.

If the legacy option ROM is
insufficient, remove some add-in
cards.

For the system that supports
UEFI, set UEFI as the first priority
or disable CSM in BIOS setup.

8999

Not enough PCIe/PCI MMIO
resources. Currently only one video
card is enabled. Remove some PCIe
cards, or enter BIOS Setup and
enable “Above 4GB Decode”

Miscellaneous error conditions

Message/Symptom

Changing display colors Display/Monitor

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

Computer will not RPL from server

Computer will not perform a Wake On LAN

®

(if applicable)

FRU/Action

1. Power Switch

2. System Board

3. Riser card, if installed.

1. Ensure that the network is in startup sequence as the
first device or the first device after diskette.

2. Ensure that the network adapter is enabled for RPL.

3. Network adapter (Advise network administrator of
new MAC address)

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)

This error message is displayed
when the PCIe/PCI MMIO
(memory mapped input/output)
resources are insufficient.

For the 32-bit operating system,
remove some add-in cards.

For the 64-bit operating system,
enable Above 4 GB Decode in
BIOS setup.

Dead computer. See “Hard disk drive boot error” on page

34.

1. Power Supply

2. System Board

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

Message/Symptom

Diskette drive in-use light remains on or does not light
when drive is active.

Blank screen except for flashing cursor.

Incorrect memory size during POST

FRU/Action

1. Diskette Drive

2. System Board

3. Diskette Drive Cable

1. System Board

2. Primary Hard Disk Drive

3. Hard Disk Drive Cable

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.

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

No power or fan not running

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

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

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

Printer problems

1. System Board

2. Diskette Drive Cable

3. Network Adapter

1. Display

2. Video adapter (if present)

3. System Board

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

1. Diskette Drive

2. System Board

3. Diskette Drive Cable

1. Display

2. System Board

1. Power switch/LED assembly

2. System Board

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

RPL computer cannot access programs from its own hard
disk.

1. Run the Setup Utility program and check the Startup
sequence.

2. Diskette Drive

3. Diskette Drive Cable

4. System Board

5. Power Supply

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

38 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Message/Symptom

RPL computer does not RPL from server

FRU/Action

1. Check the startup sequence.

2. Check the network adapter LED status.

Serial or parallel connector device failure (system board
connector)

Serial or parallel connector device failure (adapter
connector)

Some or all keys on the keyboard do not work

1. External Device Self-Test OK?

2. External Device

3. Cable

4. System Board

1. External Device Self-Test OK?

2. External Device

3. Cable

4. Alternate Adapter

5. System Board

1. Keyboard

2. Keyboard Cable

3. System Board

Undetermined problems

This section provides instructions on how to find out the failing devices or adapters.

1. Turn off the computer.

2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapters
c. Memory modules
d. Extended video memory
e. External Cache
f. External Cache RAM
g. Hard disk drive

3. Turn on the computer to retest the system.

4. Repeat steps 1 through 3 until you find the failing device or adapter.

If all devices and adapters have been removed, and the problem continues, replace the system board. See
“System board” on page 81.

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

40 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 5. Troubleshooting and recovery

This chapter provides solutions to resolve the 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 2 “Important service information” on page 27 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 41 and follow the instructions for the type of problem you are
experiencing.

4. Run the diagnostic program.

5. Recover your operating system. See “Recovery” on page 49.

6. If the problem persists, contact Lenovo.

Troubleshooting

Use the troubleshooting information to find solutions to problems that have definite symptoms.

© Copyright Lenovo 2019 41

Startup problems

Problem Solution

• Ensure that the power cord is correctly connected to the rear of the
computer and to a working electrical outlet.

The computer does not start up when you
press the power button.

The operating system does not start up from
the correct storage drive or fails to start up

• 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.

• 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.

42 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Screen problems

Problem Solution

• The computer voltage matches the voltage available at the

electrical outlet for your country or region.

• Press a key to exit the screen saver.

The screen goes blank while the computer is
on.

The image appears to be flickering.

• Press the power button to resume the computer from sleep or

hibernation mode.

• The brightness and contrast is set correctly.

• The screen goes blank when some of the programs start, install the

device drivers for the programs. Refer to the documentation for the
affected program to check whether any device drivers are required.

• The screen might be affected by interference from nearby

equipment. Magnetic fields around other devices, such as
transformers, appliances, fluorescent lights, and other monitors,
might be causing the problem. Move fluorescent desk lighting or
any equipment that produces magnetic fields farther away from the
screen. If the problem persists, turn off the computer. Then, adjust
the placement of the computer and other devices so that they are
at least 305 mm (12 inches) apart. Turn on the computer.

• Reset the refresh rate.

1. Right-click a blank area on the desktop.

2. Click Display settings. On the Display tab, click Advanced

3. Click the Monitor tab, and then reset the refresh rate to be the

display settings ➙ Display adapter properties for Display 1.

highest and noninterlaced.

The image is discolored.

• The screen might be affected by interference from nearby

equipment. Move fluorescent desk lighting or any equipment that
produces magnetic fields farther away from the screen.

• Turn off the computer. Then, adjust the placement of the computer

and other devices so that they are at least 305 mm (12 inches)
apart. Turn on the computer.

Chapter 5. Troubleshooting and recovery 43

Audio problems

Problem Solution

• When 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,

• If the 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 the computer has a front audio panel, ensure that the volume is
not set too low.

The audio cannot be heard on the Windows
operating system.

• Ensure that the 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, the audio connectors on the audio adaptor
must be used.

• Ensure that the program 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.

functional ac electrical outlet.

The sound does not come from the headset
or headphones.

The sound comes from one of the external
speakers.

1. Exit the application that uses the sound device (for example,
Windows Media Player).

2. Right-click the volume icon in the Windows notification area on
the taskbar.

3. Click Playback devices.

4. Select the headset or headphones, and then click Set Default.

5. Click OK.

• 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.

44 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Network problems

Note: The Wi-Fi and Bluetooth features are optional.

Problem Solution

• 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

The computer cannot connect to an Ethernet
LAN.

When a Gigabit Ethernet model computer is
used at a speed of 1000 Mbps, the Ethernet
LAN connection fails or errors occur.

The Wake On LAN (WOL) feature does not
work.

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 the local
network environment. Check with the local LAN administrator for
the necessary networking software.

• Set the same duplex for the switch port and the adapter. If the
adapter is configured 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.

Connect the network cable to the Ethernet connector using Category
5 wiring and a 100 BASE-T hub/switch (not 100 BASE-X).

Enable the Wake On LAN feature in UEFI BIOS.

settings.

The Wi-Fi feature does not work.

• Enable the Wi-Fi feature in UEFI BIOS.

• Enable all Wi-Fi devices.

1. 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.

Chapter 5. Troubleshooting and recovery 45

Problem Solution

• Enable the Bluetooth feature in UEFI BIOS.

• Enable all Bluetooth devices.

1. Open the Start context menu.

2. Click Device Manager. Type the administrator password or

3. Expand Bluetooth to display all Bluetooth devices. Right-click

The Bluetooth feature does not work.

Sound does not come from the Bluetooth
headset or headphones.

4. Expand Network adapters to display all network devices.

• 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.

1. Exit the application that uses the sound device (for example,
Windows Media Player).

2. Right-click the volume icon in the Windows notification area on
the taskbar.

3. Click Playback devices.

4. To use the headset profile, select Bluetooth Hands-free Audio,
and then click Set Default. To use the AV profile, select Stereo
Audio, and then click Set Default.

5. Click OK.

provide confirmation if prompted.

each Bluetooth device, and then click Enable device.

Right-click each Bluetooth device, and then click Enable

device.

46 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Performance problems

Problem Solution

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.
Excessive fragmented files exist on the
storage drives.

The free storage drive space is insufficient.

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

7. Follow the on-screen instructions.

• 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

• 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:

Optimize.

category you want to delete, and then click OK.

– 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.

Chapter 5. Troubleshooting and recovery 47

Storage drive problems

Problem Solution

• 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.

Some or all storage drives are missing from
the BIOS menu.

– If the computer is installed with SATA storage drives, ensure

– If the computer is installed with SAS storage drives, ensure that

CD or DVD problems

Problem Solution

• 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.

A CD or DVD does not work.

• 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 is good.

• If there are 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.

that the SATA storage drive enablement module (one to five
storage drives) is installed.

the SAS storage drive enablement module (one to five storage
drives) or the LSI MegaRAID SAS adapter is installed.

A bootable recovery medium, such as the
Product Recovery CD, cannot be used to
start your computer.

A black screen is displayed instead of the
DVD video.

A DVD movie does not play.

No audio or only an intermittent audio comes
out while a DVD movie is playing.

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.

• Restart the DVD player program.

• Try a lower screen resolution or color depth.

• Close any open files, and then restart the computer.

• Ensure that the disc surface is clean and not scratched.

• Check the disc or package for regional coding. You might need to
purchase a disc with coding for the region where you are using the
computer.

• 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.

48 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Problem Solution

• Disable any background programs, such as AntiVirus or Desktop

The playback is slow or choppy.

A message indicating invalid disc or no disc
found is displayed.

Themes.

• Ensure that video resolution is less than 1152 x 864 pixels.

• 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

• 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.

The serial connector cannot be accessed.

• Install any programs supplied with the serial device. Refer to the

documentation that comes with the serial device for more
information.

• If a serial-connector adapter has been added, ensure that the

adapter is installed correctly.

Software problems

Problem Solution

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

Some programs do not work as expected.

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

support.lenovo.com

and follow the on-screen instructions.

https://

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.

Chapter 5. Troubleshooting and recovery 49

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 from the following list, and then follow the on-screen instructions.

• Restore the Windows operating system from a restore point recorded on your computer

• Restore the Windows operating system from a specific system image

• Fix problems that prevent the Windows operating system from loading

• Use the Command Prompt for advanced troubleshooting

• Change the UEFI firmware settings on your computer

• Change the startup settings of the Windows operating system

• Go back to the previous build

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.

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IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

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 at least 16 GB of storage capacity. 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 you cannot start your computer, go to
problem by yourself. If you still cannot start your computer, 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.

5. Click Troubleshoot to display optional recovery solutions.

6. Select a recovery solution as desired. Then, follow the on-screen instructions to complete the process.

https://pcsupport.lenovo.com/supportphonelist first to try to solve the

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 Lenovo Vantage:

1. Open the Start menu and click Lenovo Vantage.

2. Click System Update. In the Lenovo System Update section, click Check For Updates. The
available update packages are displayed and categorized by critical, recommended, or optional.

3. Select the update packages you want and click Install selected. The update packages will be
downloaded and installed automatically.

• From the Lenovo Support Web site:
Go to

https://support.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.

Chapter 5. Troubleshooting and recovery 51

3. Follow the on-screen instructions.

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IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Chapter 6. Hardware removal and installation

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

Handling static-sensitive devices

Do not open the static-protective package containing the new part until the defective part has been removed
and you are ready to install the new part. Static electricity, although harmless to you, can seriously damage
computer components and options.

When you handle options and other computer components, take these precautions to avoid static-electricity
damage:

• Limit your movement. Movement can cause static electricity to build up around you.

• Always handle options and other computer components carefully. Handle PCI/PCIe cards, memory
modules, system boards, and microprocessors by the edges. Never touch any exposed circuitry.

• Prevent others from touching the options and other computer components.

• Touch the static-protective package containing the part to a metal expansion-slot cover or other
unpainted metal surface on the computer for at least two seconds. This reduces static electricity from the
package and your body before you install or replace a new part.

• When possible, remove the new part from the static-protective package, and install it directly in the
computer without setting the part down. When this is not possible, place the static-protective package on
a smooth, level surface and place the part on the package.

• Do not place the part on the computer cover or other metal surface.

Service tool kit

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

No. Tool name Tool type

1 Phillips-head screwdriver

2

3 Pry tools

4

5 Isolated tweezers

6 Hexagonal socket

7

8 Polyamide tape Consumable tool

9 Mylar tape

10 Eraser Consumable tool

11 Electrical tape Consumable tool

12 Double-sided tape Consumable tool

13

Torx-head screwdriver (for new Intel Xeon CPUs) Common tool

Conductive tweezers Common tool

Silicone grease Consumable tool

Conductive tape Consumable tool

Common tool

Common tool

Common tool

Common tool

Consumable tool

© Copyright Lenovo 2019 53

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 FRU and CRU

Your computer contains the following types of CRU and FRU:

• Self-service CRU: Refer to parts that can be installed or replaced easily by customer themselves or by
trained service technicians at an additional cost.

• Optional-service CRU: 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.

• FRU: Refer to parts that must be installed or replaced only by trained service technicians. If customers
choose to replace the FRU by themselves, the product warranty might be affected.

Number Description

1

2

3

4

5

6

7

8

9

10

Mouse Yes No

Computer chassis

System stand

Hinge cover No No

System board No No

Power switch board No No

Wireless charging module No No

DC-in board

Subwoofer

Wi-Fi card No No

54 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Self-service CRU Optional-service CRU

No No

No No

No No

No No

Number Description Self-service CRU Optional-service CRU

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

Computer upper cover

No No

Storage drive Yes No

Storage drive bracket

Yes No

Storage drive metal shield No No

Computer back cover

Camera module

No No

No No

Panel housing No No

System board frame

No No

Wi-Fi card cover No No

Heat sink No No

System fan

Wi-Fi antennas (2)

LCD panel

No No

No No

No No

Speakers No No

Memory module No No

M.2 SSD No No

Middle frame No No

Keyboard Yes No

29

Power adapter and power 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

Chapter 6. Hardware removal and installation 55

System board

1 GPU

3 Converter

5 M.2 Wi-Fi card slot 6 Memory slot

7 Card reader connector 8 USB 3.1 connector Gen 1/Gen 2* (2)

9 Audio connector

11 M.2 solid-state drive slot

13 USB 2.0 connectors (2)

15 Ethernet connector 16 HDMI 1.4 in connector

17 SATA connector (connecting to the storage drive) 18 LCD LVDS connector

19 Touch board connector

2 Microprocessor socket

4 Integrated camera and microphone module connector

10 CMOS battery

12 USB 3.1 connector Gen 1/Gen 2*

14 HDMI 1.4 out connector

20 System fan connector

* for A540–24ICB models only

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
2 “Important service information” on page 27.

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IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

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.

Hinge cover

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Before you open the hinge cover, turn off the computer and wait several minutes until the computer is cool.

Replacement procedure

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. Position the computer to see the rear side of the computer.

4. Remove the hinge cover.

Chapter 6. Hardware removal and installation 57

5. Install the new hinge cover.

6. Reconnect the external cables and power cords to the corresponding connectors on the computer.

7. Position the computer to see the front side of the computer.

Computer back cover

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Before you open the computer back cover, turn off the computer and wait several minutes until the computer
is cool.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the computer cover is facing up.

CAUTION:
Do not lift from the top of the LCD panel so that the integrated camera and microphone module
will not be broken.

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IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

3. Remove the screws.

4. Unplug the connectors.

Chapter 6. Hardware removal and installation 59

5. Detach the computer chassis from the computer back cover.

6. Remove the computer back cover.

60 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

7. Install the new computer back cover.

8. Attach the computer chassis to the computer back cover.

Chapter 6. Hardware removal and installation 61

9. Connect the connectors.

10. Secure the computer back cover with the screws.

11. Place the computer in an upright position.

12. Reinstall the hinge cover.

System board frame

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

62 IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Before you open the system board frame, turn off the computer and wait several minutes until the computer
is cool.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the screws.

4. Remove the system board frame.

Chapter 6. Hardware removal and installation 63

5. Install the new system board frame.

6. Secure the system board frame with the screws.

7. Reinstall the removed parts.

Memory module

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Attention: Do not touch the contact edge of the memory module. Otherwise, the memory module might get
damaged.

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IdeaCentre A540-24ICB and A540-24API Hardware Maintenance Manual

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

4. Disengage the latches.

5. Remove the memory module.

Chapter 6. Hardware removal and installation 65

6. Install the new memory module.

7. Secure the memory module with the latches.

8. Reinstall the removed parts.

System fan

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

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

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Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

4. Remove the system fan connector from the system board.

5. Remove the screws.

Chapter 6. Hardware removal and installation 67

6. Remove the system fan.

7. Install the new system fan.

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8. Secure the system fan with the screws.

9. Connect the system fan connector to the system board.

10. Reinstall the removed parts.

Heat sink

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

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

Chapter 6. Hardware removal and installation 69

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

4. Remove the system fan. See “System fan” on page 66.

5. Remove the screws.

Notes:

• Carefully remove the screws from the system board to avoid any possible damage to the system

board. The screws cannot be removed from the heat sink.

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

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

6. Remove the heat sink.

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7. Install the new heat sink.

8. Secure the heat sink with the screws.

9. Reinstall the removed parts.

Wi-Fi card

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

Chapter 6. Hardware removal and installation 71

4. Remove the screw.

5. Disconnect the Wi-Fi antenna cables from the Wi-Fi card.

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6. Remove the Wi-Fi card.

7. Install the new Wi-Fi card.

Chapter 6. Hardware removal and installation 73

8. Connect the Wi-Fi antenna cables to the Wi-Fi card.

9. Secure the Wi-Fi card with the screw.

10. Reinstall the removed parts.

M.2 SSD

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

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4. Remove the thermal pad from the M.2 SSD.

5. Remove the screw.

Chapter 6. Hardware removal and installation 75

6. Remove the M.2 SSD.

7. Install the new M.2 SSD.

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8. Secure the M.2 SSD with the screw.

9. Install the thermal pad to the M.2 SSD.

10. Reinstall the removed parts.

Chapter 6. Hardware removal and installation 77

Microprocessor

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

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.

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

Notes:

• Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the
system board. After you replace the system board, the VPD must be updated.

• Your microprocessor sockets and socket covers might look slightly different from the illustrations in this
topic.

• Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

4. Remove the system fan. See “System fan” on page 66.

5. Remove the heat sink. See “Heat sink” on page 69.

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6. Slightly push the lever to unlock the microprocessor retainer.

7. Carefully remove the microprocessor.

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8. Install the new microprocessor.

9. Slightly pull the lever down to lock the microprocessor retainer.

10. Reinstall the removed parts.

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System board

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

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.

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

Notes:

• Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the
system board. After you replace the system board, the VPD must be updated.

• Your microprocessor sockets and socket covers might look slightly different from the illustrations in this
topic.

• Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

4. To get access to the system board, remove the following parts if any:
a. “Memory module” on page 64.
b. “System fan” on page 66.
c. “Heat sink” on page 69.
d. “Wi-Fi card” on page 71.
e. “M.2 SSD” on page 74.
f. “Microprocessor” on page 78.

Chapter 6. Hardware removal and installation 81

5. Record the cable routing and cable connections, and then disconnect all cables from the system board.
See “System board” on page 56.

6. Remove the screws that secure the system board.

7. Carefully remove the system board.

Note: Carefully handle the system board by its edges.

8. Install the new system board by aligning the five screw holes in the new system board with the
corresponding mounting studs.

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9. Connect the cable connectors to the system board. See “System board” on page 56.

10. Reinstall the removed parts one by one in the reversed sequence.

Speakers

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Remove the system board frame. See “System board frame” on page 62.

Chapter 6. Hardware removal and installation 83

4. Disconnect the speakers cable from the system board.

5. Remove the screws.

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6. Remove the speakers.

7. Install the new speakers.

Chapter 6. Hardware removal and installation 85

8. Secure the speakers with screws.

9. Connect the speakers cable to the system board.

10. Reinstall the removed parts.

Storage drive

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 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:

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• 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.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

3. Push the latch to unlock the storage drive door.

4. Pull the storage drive and the bracket out.

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5. Remove the storage drive from the bracket.

6. Remove the screws that secure the storage drive cable connector.

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7. Disconnect the storage drive cable.

8. Remove the screws that secure the storage drive metal shield.

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9. Remove the storage drive metal shield.

10. Install the storage drive metal shield.

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11. Secure the storage drive metal shield with the screws.

12. Connect the storage drive cable.

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13. Secure the storage drive cable connector with the screws.

14. Install the new storage drive to the bracket.

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15. Insert the storage drive in the storage drive door.

16. Lock the storage drive door.

17. Reinstall the removed parts.

LCD panel

Prerequisite

Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.

Replacement procedure

1. Remove the hinge cover. See “Hinge cover” on page 57.

2. Remove the computer back cover. See “Computer back cover” on page 58.

Chapter 6. Hardware removal and installation 93

3. Remove the system board frame. See “System board frame” on page 62.

4. Remove the memory module. See “Memory module” on page 64.

5. Remove the system fan. See “System fan” on page 66.

6. Remove the heat sink. See “Heat sink” on page 69.

7. Remove the Wi-Fi card. See “Wi-Fi card” on page 71.

8. Remove the M.2 SSD. See “M.2 SSD” on page 74.

9. Remove the microprocessor. See “Microprocessor” on page 78.

10. Remove the system board. See “System board” on page 81.

11. Remove the storage drive. See “Storage drive” on page 86.

12. Remove the screws that secure the panel housing.

13. Remove the panel housing.

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