Fujitsu Lifebook P770 User Manual page 97

Problem
The built-in display is blank
when you turn on your
LifeBook notebook.
(continued)
The notebook 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.
The display does not
close.
The display has bright or
dark spots.
Possible Cause
Display angle and brightness
settings are not adequate for
your lighting conditions.
Power management timeouts
are set for short intervals and
you didn't see the display go
on and off again.
POST test has detected a fail-
ure which does not allow the
display to operate.
The notebook has gone into
Video timeout, Sleep mode,
or Save-to-Disk mode
because you have not used it
for a period of time.
Power management timeouts
may be set for short intervals
and you failed to notice the
display come on then go off.
A foreign object, such as a
paper clip, is stuck between
the display and keyboard.
If the spots are very tiny and
few in number, this is normal
for a large LCD display.
If the spots are numerous or
large enough to interfere with
your operation needs.
97 - Troubleshooting
Possible Solutions
Move the display and the brightness control until you have
adequate visibility. Pressing either the [F6] or [F7] keys while
holding down the [Fn] key also allows you to change the
brightness level of the display.
Press a keyboard button or move the mouse to restore oper-
ation. If that fails, push the Power/Suspend/Resume button.
(The display may be shut off by Sleep mode, Auto Suspend
or Video Timeout)
Contact your support representative.
Press a keyboard button or move the mouse to restore 
operation. If that fails, push the Power/Suspend/Resume but-
ton. Check your power management settings.
Press any button on the keyboard, or move the mouse to
restore operation. If that fails, push the Power/Sus-
pend/Resume button. (The display may be shut off by Sleep
Mode, Auto Suspend or Video Timeout)
Remove all foreign objects from the keyboard.
This is normal; do nothing.
Display is faulty; contact your support representative.