HP Compaq Businessdc7600, Service & Reference Manual

Page: 237 / 268

Service Reference Guide, dc7600 390742-001 D–11
Troubleshooting Without Diagnostics
Blank screen (no video).
(continued) Monitor cable plugged
into the wrong
connector. 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.
✎
If the graphics card is a
standard PCI expansion card,
you can enable the integrated
graphics in Computer Setup. If
a PCI-Express graphics card is
installed, the integrated
graphics can not be enabled.
Monitor settings in the
computer are not
compatible with the
monitor. 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.
Blank screen and the
power LED flashes Red five
times, once every second,
followed by a two second
pause, and the computer
beeps five times. Beeps
continue for five iterations
after which the LED flashes
will continue until the
problem is resolved. Pre-video memory error. 1. Reseat DIMMs. Power on the
system.
2. Replace DIMMs one at a time to
isolate the faulty module.
3. Replace third-party memory
with HP memory.
4. Replace the system board.
Blank screen and the
power LED flashes Red six
times, once every second,
followed by a two second
pause, and the computer
beeps six times. Beeps
continue for five iterations
after which the LED flashes
will continue until the
problem is resolved. Pre-video graphics
error. For systems with a graphics card:
1. Reseat the graphics card.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated
graphics, replace the system board.
Solving Display Problems (Continued)
Problem Cause Solution