Troubleshooting - Lenovo G400 User Manual

Chapter 4. Troubleshooting

Troubleshooting

Display problems
When I turn on the
computer, nothing appears
on the screen.
When I turn on the
computer, only a white
cursor appears on a blank
screen.
My screen goes blank while
the computer is on.
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• If the screen is blank, make sure that:
- The battery is installed correctly.
- The AC power adapter is connected to the
computer, and the power cord is plugged into a
working electrical outlet.
- The computer power is on. (Press the power button
again for confirmation.)
• If these items are properly set, and the screen remains
blank, have the computer serviced.
• Restore backed-up files to your Windows
environment or the entire contents of your hard disk
to its original factory contents using the Lenovo
OneKey Recovery system. If you still see only the
cursor on the screen, have the computer serviced.
• Your screen saver or power management may be
enabled. Do one of the following to exit from the
screen saver or to resume from sleep mode:
- Touch the touchpad.
- Press any key on the keyboard.
- Press the power button.
- Press F9 (
the LCD screen has been turned off.
) to confirm whether the backlight for