Fujitsu LifeBook U772 User Manual page 71

Problem
The LIFEBOOK turned on with a
series of beeps and the built-in
display is blank.
The display goes blank by itself
after you have been using it.
Your display won't turn on when
the system is turned on or when it
has resumed.
The display does not close.
The display has bright or dark
spots.
The display is dark when on
battery power.
Possible Cause
POST has detected a failure
that doesn't allow the display
to operate.
Power management timeouts
may be set for short intervals
and you didn't notice the dis-
play come on and go off.
The LIFEBOOK has gone into
Video timeout, Standby, or
Hibernate mode because you
have not used it recently.
The system may be password-
protected.
Small object (like a paper clip)
is stuck between the display
and keyboard.
If the spots are tiny and few,
this is normal for a large LCD
display.
If the spots are numerous or
large enough to interfere with
your operation needs.
Power Management utility
default is set on low bright-
ness to conserve power.
Possible Solutions
Contact your support representative.
Press any button on the keyboard, or move the mouse to restore operation. If that
fails, push the Power/Suspend/Resume button. (The display may be shut off by
Standby Mode, Auto Suspend or Video Timeout)
Press a button on the keyboard or move the mouse to restore operation. If that
fails, push the Power/Suspend/Resume button.
Check the status indicator panel to verify that the Security icon is blinking. If it is
blinking, enter your password.
Remove all foreign objects from the keyboard.
This is normal; do nothing.
Display is faulty; contact your support representative.
Press [Fn] + [F7] to increase brightness or double-click on the battery gauge and
adjust Power Control under battery settings.
66 - Troubleshooting