Lenovo Y520 Manual del usuario - Página 26

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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.

The screen goes blank

while the computer is on.

BIOS password problems

I forgot my password.

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• If the screen is blank, make sure that:

- The AC power adapter is connected to the computer, and

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 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.

• If you forget your user password, ask the system

administrator to clear your user password.

• If you forget your hard disk drive password, a Lenovo

authorized servicer cannot reset your password or recover

data from the hard disk. You must take your computer to a

Lenovo authorized servicer or a marketing representative to

have the hard disk drive replaced. Proof of purchase is

required, and a fee will be charged for parts and service.

• If you forget your administrator password, a Lenovo

authorized servicer cannot reset your password. You must

take your computer to a Lenovo authorized servicer or a

marketing representative to have the system board replaced.

Proof of purchase is required, and a fee will be charged for

parts and service.