Lenovo ThinkCentre A55 Owner's manual

Hardware Maintenance Manual
Types
9636 9638 9640 9641
9642 9643 9644 9645

Hardware Maintenance Manual

Note: Before using this information and the product it supports be sure to read the
information under “Notices,” on page 201.
Fourth Edition (September 2007)
©Copyright Lenovo 2006. All rights reserved.
LENOVO products, data, computer software, and services have been developed exclusively at private expense and
are sold to governmental entities as commercial items as defined by 48 C.F.R. 2.101 with limited and restricted
rights to use, reproduction and disclosure.
LIMITED AND RESTRICTED RIGHTS NOTICE: If products, data, computer software, or services are delivered
pursuant aGeneral Services Administration ″GSA″contract, use, reproduction, or disclosure is subject to restrictions
set forth in Contract No. GS-35F-05925.

Contents
Chapter 1. About this manual .....1
Important Safety Information .........1
Important information about replacing RoHS
compliant FRUs .............2
Chapter 2. Safety information .....3
General safety ..............3
Electrical safety .............3
Safety inspection guide ...........5
Handling electrostatic discharge-sensitive devices ..6
Grounding requirements ..........6
Safety notices (multi-lingual translations) .....7
Chapter 3. General information ....37
The ThinkVantage Productivity Center program ..37
Additional information resources .......37
Specifications ..............38
Chapter 4. General Checkout .....39
Problem determination tips .........39
Chapter 5. Diagnostics ........41
PC-Doctor for Windows ..........41
PC-Doctor for DOS ............41
Creating adiagnostic CD image ......42
Creating diagnostic diskettes .......42
Running diagnostics from the CD or diskettes ..42
Running diagnostics from the Rescue and
Recovery workspace ..........43
PC-Doctor for Windows PE .........43
Running diagnostics from the Rescue and
Recovery workspace ..........43
Navigating through the diagnostics programs ...44
Running tests..............44
Test results .............44
Fixed disk advanced test (FDAT) ......45
Quick and Full erase -hard drive ......46
Viewing the test log ...........47
Chapter 6. Using the Setup Utility ...49
Starting the Setup Utility program.......49
Viewing and changing settings ........49
Using passwords ............49
Password considerations .........49
User Password ............50
Administrator Password .........50
Setting, changing, and deleting apassword...50
Using Security Profile by Device .......50
Selecting astartup device..........51
Selecting atemporary startup device .....51
Changing the startup device sequence ....51
Advanced settings ............52
Exiting from the Setup Utility program .....52
Chapter 7. Symptom-to-FRU Index ...53
Hard disk drive boot error .........53
Power Supply Problems ..........53
Diagnostic error codes ...........54
Beep symptoms .............75
POST error codes ............76
Miscellaneous error messages ........78
Undetermined problems ..........79
Chapter 8. Replacing FRUs ......81
Locating connectors on the rear of your computer 82
Opening the cover ............83
Locating FRUs .............84
Identifying parts on the system board .....85
Replacing amemory module ........86
Replacing the power supply assembly .....88
Replacing the system board .........90
Replacing the microprocessor ........95
Replacing ahard disk drive ........ 101
Replacing an optical drive ......... 104
Replacing the diskette drive ........ 105
Replacing aPCI adapter.......... 106
Replacing the fan assembly......... 108
Replacing the internal speaker ........ 111
Replacing the power button and LED assembly ..113
Completing the FRU replacement.......114
Updating (flashing) BIOS from adiskette or
CD-ROM ...............115
Chapter 9. FRU lists ........117
Machine Type 9300 ...........117
Machine Type 9301 ........... 123
Machine Type 9636 ........... 128
Machine Type 9638 ........... 131
Machine Type 9640 ........... 142
Machine Type 9641 ........... 147
Machine Type 9642 ........... 152
Machine Type 9643 ........... 164
Machine Type 9644 ........... 170
Machine Type 9645 ........... 181
Chapter 10. Additional Service
Information ............ 197
Security features ............ 197
Hardware controlled Passwords ...... 197
Operating system password ....... 197
Vital product data ........... 197
BIOS levels .............. 197
Flash update procedures.......... 197
Updating (flashing) BIOS from adiskette ... 198
Recovering from aPOST/BIOS update failure .. 198
Power management ........... 199
Automatic configuration and power interface
(ACPI) BIOS............. 199
Automatic Power-On features ....... 199
©Copyright Lenovo 2006 iii

Appendix. Notices ......... 201
Television output notice .......... 202
Trademarks .............. 202
iv Hardware Maintenance Manual

Chapter 1. About this manual
This manual contains service and reference information for ThinkCentre®
computers listed on the cover. It is intended only for trained servicers who are
familiar with Lenovo computer products.
Before servicing aLenovo product, be sure to read the Safety Information. See
Chapter 2, “Safety information,” on page 3.
The Symptom-to-FRU Index and Additional Service Information chapters are not
specific to any machine type and are applicable to all ThinkCentre computers.
This manual includes acomplete FRU part number listing for each machine type
and model listed on the cover. If you have internet access, FRU part numbers are
also available at:
http:/www.lenovo.com/support
Important Safety Information
Be sure to read all caution and danger statements in this book before performing
any of the instructions.
Veuillez lire toutes les consignes de type DANGER et ATTENTION du présent
document avant d’exécuter les instructions.
Lesen Sie unbedingt alle Hinweise vom Typ ″ACHTUNG″oder ″VORSICHT″in
dieser Dokumentation, bevor Sie irgendwelche Vorgänge durchführen
Leggere le istruzioni introdotte da ATTENZIONE ePERICOLO presenti nel
manuale prima di eseguire una qualsiasi delle istruzioni
Certifique-se de ler todas as instruções de cuidado eperigo neste manual antes de
executar qualquer uma das instruções
Es importante que lea todas las declaraciones de precaución yde peligro de este
manual antes de seguir las instrucciones.
©Copyright Lenovo 2006 1

Important information about replacing RoHS compliant FRUs
RoHS, The Restriction of Hazardous Substances in Electrical and Electronic
Equipment Directive (2002/95/EC) is aEuropean Union legal requirement
affecting the global electronics industry. RoHS requirements must be
implemented on Lenovo products placed on the market after June 2006. Products
on the market before June 2006 are not required to have RoHS compliant parts.
So, if the parts are not compliant originally, replacement parts can also be
noncompliant, but in all cases, if the parts are compliant, the replacement parts
must also be compliant.
Lenovo plans to transition to RoHS compliance well before the implementation
date and expects its suppliers to be ready to support Lenovo’s requirements and
schedule. Products sold in 2005, will contain some RoHS compliant FRUs. The
following statement pertains to these products and any product Lenovo produces
containing RoHS compliant parts.
RoHS compliant ThinkCentre parts have unique FRU part numbers. Before or after
June, 2006, failed RoHS compliant parts must always be replaced using RoHS
compliant FRUs, so only the FRUs identified as compliant in the system HMM or
direct substitutions for those FRUs can be used.
Products marketed before June 2006 Products marketed after June 2006
Current or original
part
Replacement FRU Current or original
part
Replacement FRU
Non-RoHS Can be Non-RoHS Must be RoHS Must be RoHS
Non-RoHS Can be RoHS
Non-RoHS Can sub to RoHS
RoHS Must be RoHS
Note: Adirect substitution is apart with adifferent FRU part number that is
automatically shipped by the distribution center at the time of order.
2Hardware Maintenance Manual

Chapter 2. Safety information
This chapter contains the safety information that you need to be familiar with
before servicing acomputer.
General safety
Follow these rules to ensure general safety:
vObserve good housekeeping in the area of the machines during and after
maintenance.
vWhen 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 aslow 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. 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.
v
Do not perform any action that causes hazards to the customer, or that makes
the equipment unsafe.
vBefore you start the machine, ensure that other service representatives and the
customer’s personnel are not in ahazardous position.
vPlace removed covers and other parts in asafe place, away from all personnel,
while you are servicing the machine.
vKeep your tool case away from walk areas so that other people will not trip over
it.
vDo 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.
vInsert the ends of your necktie or scarf inside clothing or fasten it with a
nonconductive clip, approximately 8centimeters (3 inches) from the end.
vDo not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your
clothing.
Remember: Metal objects are good electrical conductors.
vWear 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.
vAfter service, reinstall all safety shields, guards, labels, and ground wires.
Replace any safety device that is worn or defective.
vReinstall all covers correctly before returning the machine to the customer.
Electrical safety
©Copyright Lenovo 2006 3

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 server/workstation 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 asoft 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.
vFind 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.
vDo not work alone under hazardous conditions or near equipment that has
hazardous voltages.
vDisconnect all power before:
–Performing amechanical inspection
–Working near power supplies
–Removing or installing main units
v
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.
vIf you need to work on amachine 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 acomplete circuit to cause electrical shock. By
observing the above rule, you may prevent acurrent from passing through
your body.
–When using testers, 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.
vRegularly inspect and maintain your electrical hand tools for safe operational
condition.
vDo not use worn or broken tools and testers.
vNever assume that power has been disconnected from acircuit. First, check that it
has been powered-off.
4Hardware Maintenance Manual

vAlways 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.
vDo not touch live electrical circuits with the reflective surface of aplastic dental
mirror. The surface is conductive; such touching can cause personal injury and
machine damage.
vDo not service the following parts with the power on when they are removed
from their normal operating places in amachine:
–Power supply units
–Pumps
–Blowers and fans
–Motor generators
and similar units. (This practice ensures correct grounding of the units.)
vIf an electrical accident occurs:
–Use caution; do not become avictim 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:
vElectrical hazards, especially primary power (primary voltage on the frame can
cause serious or fatal electrical shock).
vExplosive hazards, such as adamaged CRT face or bulging capacitor
vMechanical hazards, such as loose or missing hardware
The guide consists of aseries of steps presented in achecklist. 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. Athird-wire ground connector in good condition. Use ameter 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.
Chapter 2. Safety information 5

5. Check for any obvious alterations. Use good judgment as to the safety of any
alterations.
6. Check inside the unit for any obvious unsafe conditions, such as metal filings,
contamination, water or other liquids, or signs of fire or smoke damage.
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws or rivets) have not been
removed or tampered with.
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 adifference 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:
vKeep the parts in protective packages until they are inserted into the product.
vAvoid contact with other people.
vWear agrounded wrist strap against your skin to eliminate static on your body.
vPrevent the part from touching your clothing. Most clothing is insulative and
retains acharge even when you are wearing awrist strap.
vUse the black side of agrounded work mat to provide astatic-free work surface.
The mat is especially useful when handling ESD-sensitive devices.
vSelect agrounding system, such as those listed below, to provide protection that
meets the specific service requirement.
Note: The use of agrounding 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.
6Hardware Maintenance Manual

Safety notices (multi-lingual translations)
The caution and danger safety notices in this section are provided in the following
languages:
vEnglish
vArabic
vBrazilian/Portuguese
vChinese (simplified)
vChinese (traditional)
vFrench
vGerman
vHebrew
vItalian
vKorean
vSpanish
DANGER
Electrical current from power, telephone and communication cables is hazardous.
To avoid ashock hazard:
vDo not connect or disconnect any cables or perform installation, maintenance,
or reconfiguration of this product during an electrical storm.
vConnect all power cords to aproperly wired and grounded electrical outlet.
vConnect to properly wired outlets any equipment that will be attached to this
product.
vWhen possible, use one hand only to connect or disconnect signal cables.
vNever turn on any equipment when there is evidence of fire, water, or
structural damage.
vDisconnect the attached power cords, telecommunications systems, networks,
and modems before you open the device covers, unless instructed otherwise
in the installation and configuration procedures.
vConnect and disconnect cables as described in the following table 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.
Chapter 2. Safety information 7

CAUTION:
When replacing the lithium battery, use only Part Number 33F8354 or an
equivalent type battery recommended by the manufacturer. If your system has a
module containing alithium 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:
vThrow or immerse into water
vHeat to more than 100°C (212°F)
vRepair or disassemble
Dispose of the battery as required by local ordinances or regulations.
CAUTION:
When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices,
or transmitters) are installed, note the following:
vDo 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.
vUse 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 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)
CAUTION:
Use safe practices when lifting.
8Hardware Maintenance Manual

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.
1
2
Chapter 2. Safety information 9

10 Hardware Maintenance Manual

Chapter 2. Safety information 11

≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)
1
2
12 Hardware Maintenance Manual

PERIGO
Acorrente elétrica proveniente de cabos de alimentação, de telefone ede
comunicações éperigosa.
Para evitar risco de choque elétrico:
vNão conecte nem desconecte nenhum cabo ou execute instalação, manutenção
ou reconfiguração deste produto durante uma tempestade com raios.
vConecte todos os cabos de alimentação atomadas elétricas corretamente
instaladas eaterradas.
vTodo equipamento que for conectado aeste produto deve ser conectado a
tomadas corretamente instaladas.
vQuando possível, utilize apenas uma das mãos para conectar ou desconectar
cabos de sinal.
vNunca ligue nenhum equipamento quando houver evidência de fogo, água ou
danos estruturais.
vAntes de abrir tampas de dispositivos, desconecte cabos de alimentação,
sistemas de telecomunicação, redes emodems conectados, amenos que
especificado de maneira diferente nos procedimentos de instalação e
configuração.
vConecte edesconecte os cabos conforme descrito na tabela apresentada aseguir
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.
Chapter 2. Safety information 13

CUIDADO:
Ao substituir abateria de lítio, utilize apenas uma bateria com Número de Peça
33F8354 ou um tipo de bateria equivalente recomendado pelo Se oseu sistema
possui um módulo com uma bateria de lítio, substitua-o apenas por um módulo
do mesmo tipo edo mesmo fabricante. Abateria contém lítio epode explodir se
não for utilizada, manuseada ou descartada de maneira correta.
Não:
vJogue ou coloque na água
vAqueça amais de 100°C (212°F)
vConserte nem desmonte
Descarte abateria conforme requerido pelas leis ou regulamentos locais.
PRECAUCIÓN:
Quando produtos alaser (como unidades de CD-ROMs, unidades de DVD-ROM,
dispositivos de fibra ótica ou transmissores) estiverem instalados, observe o
seguinte:
vNão remova as tampas. Aremoção das tampas de um produto alaser pode
resultar em exposição prejudicial àradiação de laser. Não existem peças que
podem ser consertadas no interior do dispositivo.
vAutilização de controles ou ajustes ou aexecução de procedimentos diferentes
dos especificados aqui pode resultar em exposição prejudicial àradiação.
PERIGO
Alguns produtos alaser contêm diodo de laser integrado da Classe 3A ou da
Classe 3B. Observe oseguinte:
Radiação alaser quando aberto. Não olhe diretamente para ofeixe aolho nu ou
com instrumentos ópticos eevite exposição direta ao feixe.
≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)
CUIDADO:
Utilize procedimentos de segurança para levantar equipamentos.
14 Hardware Maintenance Manual