Solving Display Problems - HP dc5100 - Microtower PC Service & Reference Manual

Solving Display Problems

Problem
Blank screen (no video).
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CAUTION: When attempting to resume from standby mode, do not hold down the
power button for more than four seconds. Otherwise, the computer will shut down and
you will lose any unsaved data.
Service Reference Guide, dc5100
Cause
The cable connections
are not correct.
Screen blanking utility
installed or energy
saver features enabled.
System ROM is bad;
system is running in
FailSafe Boot Block
mode (indicated by
eight red blinks from the
power LED and eight
simultaneous beeps).
Fixed-sync monitor will
not sync at the
resolution chosen.
Computer is in
standby mode.
Monitor cable plugged
into the wrong
connector.
Monitor settings in the
computer are not
compatible with the
monitor.
376220-001
Solution
Check the cable connections from
the monitor to the computer and to
the electrical outlet.
Press any key or click the mouse
button and, if set, type your
password.
1. Reflash the ROM using a
ROMPaq diskette.
2. Replace the system board.
Ensure that the monitor can accept
the same horizontal scan rate as the
resolution chosen.
Press the power button to resume
from standby mode.
If the computer system has both
an integrated graphics connector
and a graphics expansion card
connector, plug the monitor cable
into the expansion card connector.
1. Restart the computer and press
F8 during startup when you see
"Press F8" in the bottom right
corner of the screen.
2. Using the keyboard arrow keys,
select Enable VGA Mode
and press Enter.
3. In Windows Control Panel,
double-click the Display icon
and select the Settings tab.
4. Use the sliding control to reset
the resolution.
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