Lenovo G580 Manual

							Important service information
17
Use the following strategy to prevent unnecessary expense for replacing and 
servicing FRUs:
 If you are instructed to replace an FRU, but the replacement does not solve 
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 of them, and replacing one of them does not solve 
the problem, reinstall that board, and then replace the other one.
 If an adapter or a device consists of more than one FRU, any of the FRUs may 
be the cause of the error. Before replacing the adapter or device, remove the 
FRUs one by one to see if the symptoms change. Replace only the FRU that 
changed the symptoms.
Attention: The setup configuration on the computer you are servicing may have 
been customized. Running Automatic Configuration may alter the settings. Note 
the current configuration settings (using the View Configuration option); then, 
when service has been completed, verify that those settings remain in effect.
Strategy for replacing a hard disk drive
Always try to run a low-level format before replacing a hard disk drive. This will 
cause all customer data on the hard disk to be lost. Make sure that the customer 
has a current backup of the data before performing this action.
Attention:  The drive startup sequence in the computer you are servicing may 
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 can cause damage to those components, and may cause a system 
malfunction.
Attention: When handling a system board:
 Do not drop the system board or apply any excessive force to it.
 Avoid rough handling of any kind.
 Avoid bending the system board and hard pushing to prevent cracking at 
each BGA (Ball Grid Array) chipset. 
						

							Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
Manual
18
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. If the original FRU parts are non-compliant, 
replacement parts can also be non-compliant. In all cases if the original 
FRU parts are RoHS compliant, the replacement part must also be RoHS 
compliant.
Note: RoHS and non-RoHS FRU part numbers with the same fit and function are 
identified with unique FRU part numbers.
Lenovo plans to transit to RoHS compliance well before the implementation date 
and expects its suppliers to be ready to support Lenovo’s requirements and 
schedule in the EU. Products sold in 2005 and 2006 will contain some RoHS 
compliant FRUs. The following statement pertains to these products and any 
product Lenovo produces containing RoHS compliant FRUs.
RoHS compliant FRUs have unique FRU part numbers. Before or after the RoHS 
implementation date, failed RoHS compliant parts must always be replaced with 
RoHS compliant ones, so only the FRUs identified as compliant in the system 
HMM or direct substitutions for those FRUs may be used.
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 the order.
Products marketed before June 2006Products marketed after June 2006
Current or 
original partReplacement 
FRUCurrent or 
original partReplacement 
FRU
Non-RoHSCan be Non-RoHS
Must be RoHSMust be RoHSNon-RoHSCan be RoHS
Non-RoHSCan sub to RoHS
RoHSMust be RoHS
Important information about replacing RoHS compliant FRUs 
						

							General checkout
19
This chapter presents the following information:
 “What to do first” on page 20
 “Power system checkout” on page 21
Before you go to the checkout, make sure to read the following important notes:
General checkout
Important notes:
•Only certified trained personnel can service the computer.
Before replacing any FRU, read the entire page on removing and 
replacing FRUs.
When you replace FRUs, use new nylon-coated screws.
Be extremely careful during such write operations as copying, 
saving, or formatting. Drives in the computer that you are servicing 
sequence might have been altered. If you select an incorrect drive, data 
or programs might be overwritten.
Replace an FRU only with another FRU of the correct model. When 
you replace an FRU, make sure that the machine model and the FRU part 
number are correct by referring to the FRU parts list. 
An FRU should not be replaced just because of a single, 
unreproducible failure. Single failures can occur for a variety of reasons 
that have nothing to do with a hardware defect, such as cosmic radiation, 
electrostatic discharge, or software errors. Consider replacing an FRU 
only when a problem recurs. If you suspect that an FRU is defective, 
clear the error logs and run the test again. If the error does not recur, do 
not replace the FRU.
Be careful not to replace a nondefective FRU. 
						

							Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
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20
When you do return an FRU, you must include the following information in the 
parts exchange form or parts return form that you attach to it:
1. Name and phone number of servicer
2. Date of service
3. Date on which the machine failed
4. Date of purchase
5. Procedure index and page number in which the failing FRU was detected
6. Failing FRU name and part number
7. Machine type, model number, and serial number
8. Customer’s name and address
Note for warranty: During the warranty period, the customer may be 
responsible for repair costs if the computer damage was caused by misuse, 
accident, modification, unsuitable physical or operating environment, or 
improper maintenance by the customer.
The following is a list of some common items that are not covered under 
warranty and some symptoms that might indicate that the system was subjected 
to stress beyond normal use.
Before checking problems with the computer, determine whether the damage is 
covered under the warranty by referring to the following list:
The following are not covered under warranty:
 LCD panel cracked from the application of excessive force or from being 
dropped
 Scratched (cosmetic) parts
 Distortion, deformation, or discoloration of the cosmetic parts
 Plastic parts, latches, pins, or connectors that have been cracked or broken by 
excessive force
 Damage caused by liquid spilled into the system
 Damage caused by the improper insertion of a PC Card or the installation of 
an incompatible card
 Improper disk insertion or use of an optical drive
 Diskette drive damage caused by pressure on the diskette drive cover, foreign 
material in the drive, or the insertion of a diskette with multiple labels
 Damaged or bent diskette eject button
 Fuses blown by attachment of a nonsupported device
 Forgotten computer password (making the computer unusable)
 Sticky keys caused by spilling a liquid onto the keyboard
 Use of an incorrect AC adapter on laptop products
The following symptoms might indicate damage caused by nonwarranted 
activities:
 Missing parts might be a symptom of unauthorized service or modification. 
 If the spindle of a hard disk drive becomes noisy, it may have been subjected 
to excessive force, or dropped.
What to do first 
						

							General checkout
21
To verify a symptom, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Make sure that power is supplied when you turn on the computer.
5. Turn off the computer.
6. Disconnect the AC adapter and install the charged battery pack.
7. Make sure that the battery pack supplies power when you turn on the 
computer.
If you suspect a power problem, see the appropriate one of the following power 
supply checkouts:
 “Checking the AC adapter” on page 21
 “Checking operational charging” on page 22
 “Checking the battery pack” on page 22
Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
 If the power-on indicator does not turn on, check the power cord of the AC 
adapter for correct continuity and installation.
 If the computer does not charge during operation, go to “Checking 
operational charging”.
To check the AC adapter, follow the steps below:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the 
following figure:
Note: Output voltage for the AC adapter pin No. 2 may differ from the one you 
are servicing.
3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
 Replace the system board.
 If the problem persists, go to “Lenovo G480/G485/G580/G585/G780” on 
page 27.
Note: Noise from the AC adapter does not always indicate a defect.
Power system checkout
2
1
Voltage (V DC)
+20
0 Pin
1
2 
						

							Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
Manual
22Checking operational charging
To check whether the battery charges properly during operation, use a 
discharged battery pack or a battery pack that has less than 50% of the total 
power remaining when installed in the computer.
Perform operational charging. If the battery status indicator or icon does not 
light on, remove the battery pack and let it return to room temperature. Reinstall 
the battery pack. If the charge indicator or icon is still off, replace the battery 
pack.
If the charge indicator still does not light on, replace the system board. Then 
reinstall the battery pack. If it is still not charged, go to the next section.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% 
of the total power remains; under this condition the battery pack can charge to 
100% of its capacity. This protects the battery pack from being overcharged or 
from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray 
of the Windows
® taskbar and wait for a moment (but do not click it), and the 
percentage of battery power remaining is displayed. To get detailed information 
about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. Remove 
it from the computer and leave it at room temperature for a while. After it cools 
down, reinstall and recharge it.
To check the battery pack, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack and measure the voltage between battery terminals 
1 (+) and 7 (-). See the following figure:
3. If battery output voltage is less than +3.9V DC, the battery is damaged, 
replace it. 
If battery output voltage is less than +9V DC, perhaps the battery has entered 
into overdischarge protection mode, pre-charge the battery with AC, please 
replace the battery if battery capacity can not be charged over 0% within 2 
hours.
4. If the battery output voltage is more than +9V DC, measure the resistance 
between battery terminals 5 and 7. The resistance should be 4 to 30 KΩ.
If the resistance is not correct, replace the battery pack. If the resistance is 
correct, check the system board function.
1(+)2(+)3456(-)7(-)
Terminal
1 +0 to +12.6
7 Ground (-)Voltage (V DC) 
						

							Related service information
23
This chapter presents the following information:
 “Restoring the factory contents by using Recovery Disc Set” on page 23
 “Passwords” on page 24
 “Power management” on page 25
When the hard disk drive or solid state drive is replaced because of a failure, no 
product recovery program is on the new drive. In this case, you must use the 
Recovery Disc Set for the computer. Order the Recovery Disc Set and the drive at 
the same time so that you can recover the new drive with the pre-installed 
software when they arrive.
The Recovery Disc Set consists of the following set of DVDs to restore the 
computer to the original factory configuration.
Start Recovery Disc (one disc)
This disc is used to format the hard disk drive and initiate the recovery process.
Operating System Recovery Disc (one or more discs)
This disc restores the Microsoft Windows operating system. 
Applications and Drivers Recovery Disc (one or more discs)
This disc restores the pre-installed applications and drivers on the computer.
Supplemental Recovery Disc
This disc contains additional content, such as software for specific models and 
updates to the software that was preloaded on the computer. Not all recovery 
disc sets come with a Supplemental Recovery Disc. 
To restore the computer to the original factory configuration using the recovery 
disc set, do the following:
1. Insert the bootable Start Recovery Disc into the optical drive. 
2. Start the computer. When the Lenovo logo comes up, immediately press F12; 
on the boot sequence menu, select the optical drive as the first boot-up device. 
The computer will boot from the Start Recovery Disc. Follow the on-screen 
instructions  to begin the recovery process. 
3. Read the license. If you agree with the terms, select I accept these terms and 
conditions and then click Next. 
4. Insert the Operating System Recovery Disc when prompted and click Yes to 
begin the operating system recovery process. 
5. Insert the Applications and Drivers Recovery Disc when prompted and then 
click OK to begin the applications and drivers recovery process. 
6. If you have a Supplemental Recovery Disc, insert it when prompted and click 
Yes. If you do not have a Supplemental Recovery Disc, click No. 
Related service information
Restoring the factory contents by using Recovery Disc Set 
						

							Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
Manual
24
7. When all of the data has been copied from the last disc in the set, remove the 
disc and restart the computer.
8. When the recovery process is complete, the Welcome to the Microsoft 
Windows screen is displayed. Follow the instructions on the screen to 
complete the Windows setup.
As many as three passwords may be needed for any Lenovo computer: the 
power-on password (POP), the hard disk password (HDP), and the supervisor 
password (SVP).
If any of these passwords has been set, a prompt for it appears on the screen 
whenever the computer is turned on. The computer does not start until the 
password is entered.
Exception: If only an SVP is installed, the password prompt does not appear 
when the operating system is booted.
Power-on password
A power-on password (POP) protects the system from being powered on by an 
unauthorized person. The password must be entered before an operating system 
can be booted.
Hard-disk password
There are two hard-disk passwords (HDPs):
+ User HDP - for the user
+ Master HDP - for the system administrator, who can use it to get access to the 
hard disk drive even if the user has changed the user HDP
Attention: If the user HDP has been forgotten, check whether a master HDP has 
been set. If it has, it can be used for access to the hard disk drive. If no master 
HDP is available, neither Lenovo nor Lenov authorized service technicians 
provide any services to reset either the user or the master HDP, or to recover data 
from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.
Supervisor password
A supervisor password (SVP) protects the system information stored in the BIOS 
Setup Utility. The user must enter the SVP in order to get access to the BIOS 
Setup Utility and change the system configuration.
Attention: If the SVP has been forgotten and cannot be made available to the 
servicer, there is no service procedure to reset the password. The system board 
must be replaced for a scheduled fee.Note: The remainder of the recovery process is fully automated and no 
action is required by you. The computer will restart into the Windows 
desktop several times and you might exper ie n ce  pe riod s whe n  n o ac ti vi ty  is 
apparent on the screen for several minutes at a time. This is normal.
Passwords 
						

							Related service information
25
Note: Power management modes are not supported for APM operating system.
To reduce power consumption, the computer has three power management 
modes: screen blank, sleep (standby), and hibernation.
Screen blank mode
If the time set on the “Turn off monitor” timer in the operating system expires, 
the LCD backlight turns off. You can also turn off the LCD backlight by pressing 
Fn+F2.
To end screen blank mode and resume normal operation, press any key.
Sleep (standby) mode
When the computer enters sleep (standby) mode, the following events occur in 
addition to what occurs in screen blank mode:
 The LCD is powered off.
 The hard disk drive is powered off.
 The CPU stops.
To enter sleep (standby) mode, press Fn+F1.
In certain circumstances, the computer goes into sleep (standby) mode 
automatically:
 If a “suspend time” has been set on the timer, and the user does not do any 
operation with the keyboard, the hard disk, the parallel connector, or the 
diskette drive within that time.
 If the battery indicator is amber, indicating that the battery power is low. 
(Alternatively, if Hibernate when battery becomes low has been selected in 
the “Power Management Properties” window, the computer goes into 
hibernation mode.)
To cause the computer to return from sleep (standby) mode and resume the 
operation, do one of the following:
 Press the Fn key.
 Open the lid.
 Turn on the power switch.
Also, in the following event, the computer automatically returns from sleep 
(standby) mode and resumes the operation:
 The time set on the resume timer elapses.
Note: The computer does not accept any input immediately after it enters sleep 
(standby) mode. Wait a few seconds before taking any action to reenter 
operation mode.
Power management 
						

							Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
Manual
26Hibernation mode
In hibernation mode, the following occurs:
 The system status, RAM, VRAM, and setup data are stored on the hard disk.
 The system is powered off.
To cause the computer to enter hibernation mode, follow the steps below:
 If you are using the ACPI operating system and have defined one of the 
following actions as the event that causes the system to go into hibernation 
mode, perform that action:
– Closing the lid.
– Pressing the power button.
Also, the computer goes into hibernation mode automatically in either of the 
following conditions:
 If a “hibernation time” has been set on the timer, and if the user does not do 
any operation with the keyboard, the hard disk drive, the parallel connector, 
or the diskette drive within that time.
 If the timer conditions are satisfied in suspend mode.
When the power is turned on, the computer returns from hibernation mode and 
resumes operation. The hibernation file in the boot record on the hard disk drive 
is read, and system status is restored from the hard disk drive.