Lenovo IdeaCentre A700 4024 User manual

Contents
i
Contents
Chapter 1. About this manual................................................ 1
Important Safety Information ...................................................................... 1
Important information about replacing RoHS compliant FRUs ..2
Chapter 2. Safety information................................................ 4
General safety....................................................................................................... 4
Electrical safety ....................................................................................................5
Safety inspection guide...................................................................................7
Handling electrostatic discharge-sensitive devices .........................8
Grounding requirements ...............................................................................8
Safety notices........................................................................................................9
Chapter 3. General information...........................................12
Specifications..................................................................................................... 12
Chapter 4. General Checkout ...............................................13
Problem determination tips ...................................................................... 14
Chapter 5. Using the Setup Utility ......................................15
Starting the Setup Utility program ......................................................... 15
Viewing and changing settings................................................................ 15
Using passwords .............................................................................................. 16
Using Device ...................................................................................................... 18
Selecting a startup device........................................................................... 19
Exiting from the Setup Utility program ................................................ 20

Hardware Maintenance Manual
ii
Chapter 6. Symptom-to-FRU Index.....................................21
Hard disk drive boot error ........................................................................... 21
Power Supply Problems................................................................................ 22
POST error codes ............................................................................................. 22
Undetermined problems ............................................................................. 24
Chapter 7. Locations...............................................................25
Locating components and connectors................................................. 25
Chapter 8. Replacing hardware ...........................................29
General information ....................................................................................... 29
Removing the computer stand................................................................. 30
Removing the computer cover................................................................. 32
Removing the motherboard cover ......................................................... 33
Replacing the hard disk drive .................................................................... 33
Replacing the optical disk drive ............................................................... 35
Replacing a memory module .................................................................... 37
Replacing connectors module.................................................................. 38
Replacing the system fans........................................................................... 40
Replacing the heatsink.................................................................................. 41
Removing the inverter board .................................................................... 42
Replacing the touch module ..................................................................... 43
Replacing the bluetooth module ............................................................ 44
Replacing the WLAN card card................................................................. 45
Replacing the TV tuner card card............................................................. 45
Replacing the speakers system................................................................. 46
Replacing the motherboard....................................................................... 47
Replacing the LED panel .............................................................................. 48
Replacing the camera.................................................................................... 50
Replacing the keyboard .............................................................................. 52
Replacing the mouse ..................................................................................... 53
Replacing the power cord or power adapter..................................... 54
Chapter 9. Additional Service Information.......................55
Power management ...................................................................................... 55
Appendix. Statement .............................................................56

Chapter 1. About this manual
1
About this manual 1
This manual contains service and reference information for Lenovo
IdeaCentre A7 computers listed on the cover. It is intended only for
trained servicers who are familiar with Lenovo computer products.
Before servicing a Lenovo product, be sure to read the Safety Information.
The description of the TV card in this manual is only used for the machines
which have the TV card. It is invalid for those machines which do not have
TV card.
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 e PERICOLO presenti nel
manuale prima di eseguire una qualsiasi delle istruzioni
Certifique-se de ler todas as instruções de cuidado e perigo neste manual
antes de executar qualquer uma das instruções
Es importante que lea todas las declaraciones de precaución y de peligro
de este manual antes de seguir las instrucciones.
执行任何说明之前，请确保已阅读本书中的所有警告和危险声明。

Hardware Maintenance Manual
2
Important information about replacing RoHS compliant FRUs
RoHS, The Restriction of Hazardous Substances in Electrical and
Electronic Equipment Directive (2002/95/EC) is a European 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 Lenovo IdeaCentre A7 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: A direct substitution is a part with a different FRU part number that
is automatically shipped by the distribution center at the time of
order.
Related Web URLs are:
Lenovo information for Suppliers website:•
http://www-03.ibm.com/procurement/proweb.nsf/
ContentDocsByTitle/United+States~Information+for+suppliers
RoHS Directive:•
http://europa.eu.int/eur-lex/pri/en/oj/dat/2003/l_037/
l_03720030213en00190023.pdf

Chapter 1. About this manual
3
California Senate Bills 20, 50:•
http://www.ciwmb.ca.gov/HHW/Events/AnnualConf/2004/
presentation/MPaparian.pdf

Hardware Maintenance Manual
4
Safety information 2
This chapter contains the safety information that you need to be familiar
with before servicing a computer.
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. 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.

Chapter 2. Safety information
5
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.
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 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 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 main units
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.

Hardware Maintenance Manual
6
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 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.
Regularly inspect and maintain your electrical hand tools for safe•
operational condition.
Do not use worn or broken tools and testers.•
Never assume•that power has been disconnected from a circuit. First,
check that it has been powered-off.
Always look carefully for possible hazards in your work area. Examples•
of these hazards are moist floors, nongrounded power extension cables,
power surges, and missing safety grounds.
Do not touch live electrical circuits with the reflective surface of a•
plastic dental mirror. The surface is conductive; such touching can
cause personal injury and machine damage.
Do not service the following parts with the power on when they are•
removed from their normal operating places in a machine:
– 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.

Chapter 2. Safety information
7
Safety inspection guide
The intent of this inspection guide is to assist you in identifying potentially
unsafe conditions on these products. Each machine, as it was designed
and built, had required safety items installed to protect users and service
personnel from injury. This guide addresses only those items. However,
good judgment should be used to identify potential safety hazards due to
attachment of features or options not covered by this inspection guide.
If any unsafe conditions are present, you must determine how serious the
apparent hazard could be and whether you can continue without first
correcting the problem.
Consider these conditions and the safety hazards they present:
Electrical hazards, especially primary power (primary voltage on the•
frame can cause serious or fatal electrical shock).
Explosive hazards, such as a damaged CRT face or bulging capacitor•
Mechanical hazards, such as loose or missing hardware•
The guide consists of a series of steps presented in a checklist. Begin the
checks with the power off, and the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, broken, or sharp edges).
2. Power-off the computer. Disconnect the power cord.
3. Check the power cord for:
a. A third-wire ground connector in good condition. Use a meter to
measure third-wire ground continuity for 0.1 ohm or less between
the external ground pin and frame ground.
b. The power cord should be the appropriate type as specified in the
parts listings.
c. Insulation must not be frayed or worn.
4. Remove the cover.
5. Check for any obvious alterations. Use good judgment as to the safety
of any alterations.
6. Check inside the unit for any obvious unsafe conditions, such as metal
filings, contamination, water or other liquids, or signs of fire or smoke
damage.
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws or rivets) have not
been removed or tampered with.

Hardware Maintenance Manual
8
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.•
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.

Chapter 2. Safety information
9
Safety notices
The caution and danger safety notices in this section are provided in the
the language of English.
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 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.

Hardware Maintenance Manual
10
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 a lithium battery, replace it only with
the same module type made by the same manufacturer. The battery
contains lithium and can explode if not properly used, handled, or
disposed of.
Do not:
Throw or immerse into water•
Heat to more than 100°C (212°F)•
Repair or disassemble•
Dispose of the battery as required by local ordinances or regulations.
CAUTION:
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.

Chapter 2. Safety information
11
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.
1
2
CAUTION:
Do not place any object weighing more than 82 kg (180 lbs.) on top of
rack-mounted devices.

Hardware Maintenance Manual
12
General information 3
This chapter provides general information that applies to all machine
types supported by this publication.
Specifications
This section lists the physical specifications for your computer.
Type Lenovo IdeaCentre A7
This section lists the physical specifications.
Environment
Air temperature:
Operating: 10° to 35°C
Transit: -20° to 55°C
Humidity:
Operating: 35% to 80%
Transit: 20% to 93% (40°C)
Altitude: 86KPa to 106KPa
Electrical input
Input voltage: 100V-240V
Input frequency: 50Hz-60Hz

Chapter 4. General Checkout
13
General Checkout 4
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.
Attention
General error messages appear if a problem or conflict is found by an
application program, the operating system, or both. For an explanation
of these messages, refer to the information supplied with that software
package.
Notes
• Thedefaultisforthiscomputertobootupinquietmode(nobeep,
no memory count and checkpoint code display) when no errors are
detected by POST.
• Toenablebeep,memorycount,andcheckpointcodedisplaywhen
a successful POST occurs, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility
program”.
2. Select Start Options.
3. Set Power-On Self-Test to Enhanced.
• BeforereplacinganyFRUs,ensurethatthelatestlevelofBIOSis
installed on the system. A down-level BIOS might cause false errors
and unnecessary replacement of the system board.
Use the following procedure to help determine the cause of the problem:
1. Power-off the computer and all external devices.
2. Check all cables and power cords.
3. Set all display controls to the middle position.
4. Power-on all external devices.

Hardware Maintenance Manual
14
5. Power-on the computer.
• Lookfordisplayederrorcodes
• Lookforreadableinstructionsoramainmenuonthedisplay.
If you did not receive the correct response, proceed to step 6.
If you do receive the correct response, proceed to step 7.
6. Look at the following conditions and follow the instructions:
• IfthecomputerdisplaysaPOSTerror,goto“POSTerrorcodes”.
• Ifthecomputerhangsandnoerrorisdisplayed,continueatstep7.
7. If 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 upgrades•
Failure symptom•
– Do diagnostics indicate a failure?
– What, when, where, single, or multiple systems?
– Is the failure repeatable?
– Has this configuration ever worked?
– If it has been working, what changes were made prior to it 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
Note: 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 configuration options set in the system
7. Have the same setup for the operation system control files
Comparing the configuration and software set-up between“working
and non-working”systems will often lead to problem resolution.

Chapter 5. Using the Setup Utility
15
Using the Setup Utility 5
The Setup Utility program is used to view and change the configuration
settings of your computer, regardless of which operating system you are
using. However, the operating-system settings might override any similar
settings in the Setup Utility program.
Starting the Setup Utility program
To start the Setup Utility program, do the following:
1. If your computer is already on when you start this procedure, shut
down the operating system and turn off the computer.
2. Turn on the computer when you see the “Press F1 to enter Setup, F12 to
display Boot Menu”showed on display and then press F1.
Notes:
a. If you are using a USB keyboard and the Setup Utility program does
not display using this method, repeatedly press and release the F1
key rather than leaving it pressed when turning on the computer.
b. If a Power-On Password or an administrator password has been set,
the Setup Utility program menu is not displayed until you type your
password. For more information, see “Using passwords.”
Viewing and changing settings
The Setup Utility program menu lists items that identify system
configuration topics. To view or change settings, see “Starting the Setup
Utility program.”
When working with the Setup Utility program menu, you must use the
keyboard. The keys used to perform various tasks are displayed on the
right side of each screen.

Hardware Maintenance Manual
16
Using passwords
By using the Setup Utility program, you can set passwords to prevent
unauthorized persons from gaining access to your computer and data.
See “Starting the Setup Utility program.”The following types of passwords
are available:
• AdministratorPassword
• Power-OnPassword
You do not have to set any passwords to use your computer. However, if
you decide to set any passwords, read the following sections.
Password considerations
A password can be any combination of up to 64 characters (a-z and 0-9).
For security reasons, it is a good idea to use a strong password that cannot
be easily compromised. We suggest the passwords should adhere to the
following rules:
• Musthaveatleastsevencharactersinlength
• Containatleastonealphabeticcharacterandonenumericcharacter
• SetupUtilityprogramandharddiskdrivepasswordsarenotcase
sensitive
• Notbeyournameoryourusername
• Notbeacommonwordoracommonname
• Besignicantlydierentfromyourpreviouspassword
Administrator password
When a Administrator Password is set, it deters unauthorized persons from
changing configuration settings. If you are responsible for maintaining
the settings of several computers, you might want to set a Administrator
Password.
After you set a Administrator Password, a password prompt is displayed
each time you try to access the Setup Utility program.
If both the Administrator and Power-On Password are set, you can type
either password. However, to change any configuration settings, you must
use your Administrator password.

Chapter 5. Using the Setup Utility
17
Setting, changing, and deleting a Administrator password
To set, change, or delete a password, do the following:
Note
A password can be any combination of up to 64 characters (a-z, and
0-9). For more information, see “Password considerations” on page 16.
1. Start the Setup Utility program (see “Starting the Setup Utility program”
on page 15).
2. From Security menu, select Set Administrator Password and press
Enter.
3. The password dialog box will be displayed. Type the new password,
and press Enter.
4. when prompted to confirm the password, type the password again. If
you type the password correctly, the password will be installed.
To change and delete a previously Administrator password, do the following:
Note: When prompted for a password, you must type your Administrator
password.
1. From Security menu, select Set Administrator Password and press
Enter.
2. The password dialog box will be displayed. Enter Current Password and
press Enter. Press Enter in New Password and confirm New Password
dialog. A setup notice will display that changes have been saved.
3. Select Exit.
4. Select Save changes and Exit.
Power-On Password
When a Power-On Password is set, you cannot start the Setup Utility
program until a valid password is typed from the keyboard.
Setting, changing, and deleting a Power-On Password
To set, change, or delete a Power-On Password, do the following:
Note
A password can be any combination of up to 64 characters(a-z, and
0-9).
1. Start the Setup Utility program (See ”Starting the Setup Utility program”.)
2. From the Security menu, selet Set Power-On Password and press Enter.

Hardware Maintenance Manual
18
3. The password dialog box will be displayed. Type the new password, and
press Enter.
4. when prompted to confirm the password, type the password again. If
you type the password correctly, the password will be installed.
To change and delete a previously Power-On Password, do the following:
1. From the Security menu, select Set Power-On Password and press
Enter.
2. The password dialog box will be displayed. Enter Current Password and
press Enter. Press Enter in New Password and confirm New Password
dialog. A setup notice will display that changes have been saved.
3. Select Exit.
4. Select Save changes and Exit.
After the password is set, you may select the“Advanced”Menu for device setup.
Using Device
Device is used to enable or disable user access to the following device
Audio Setup When this feature is set to Disable,
the device of Audio Setup is
disabled and will not be displayed in
the system configuration.
To set Device, do the following:
1. Start the Setup Utility program (see “Starting the Setup Utility program”
on page 15).
2. From the Setup Utility program menu, select Devices.
3. Select Audio Setup.
4. Select Disabled or Enabled and press Enter.
5. Return to the Setup Utility program menu and press F10 to save
configuration changes and exit setup.
Note
If you do not want to save the settings, select Exit and select Discard
changes and Exit. You can set others such as Network Setup.
See the information displayed on the right side of the screen.