Lenovo IdeaPad Y480 - Manual (Page 29)

Chapter 4. Troubleshooting
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Display problems
When I turn on the computer,
nothing appears on the screen. • If the screen is blank, make sure that:
- The battery is installed correctly.
- The AC 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.)
- The memory is installed correctly.
• If these items are properly set, and the screen remains blank, have
the computer serviced.
When I turn on the computer, only a
white cursor appears on a blank
screen. • Restore the system partition to its initial status or a previously
created back-up point using the OneKey Recovery system. If you
still see only the cursor on the screen, have the computer serviced.
My screen goes blank while the
computer is on. • 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:
- Press any key on the keyboard.
- Press the power button.
- Press Fn + F2 to confirm whether the backlight for the LCD screen
has been turned off.
Password problems
I forgot my password. • If you forget your user password, ask the system administrator to
clear your user password.
• If you forget your HDD 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 supervisor 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.