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...

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...

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,...

Lenovo G480/G485/G580/G585/G780 Hardware Maintenance 
Manual
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...

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...

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...

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...

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...

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...

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...