Lenovo Z500 Touch, User Manual, Page: 30 / 35

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Chapter 4. Troubleshooting
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 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.)
•
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 original 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 F9 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 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 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.
Sleep problems
The critical low-battery error
message appears, and the
computer immediately turns
off. •
The battery power is getting low. Connect the AC adapter to
the computer.