HP Compaq dc5700 MT Reference Manual page 181

Solving Display Problems (Continued)
Problem
Blank screen and the
power LED flashes Red
seven times, once every
second, followed by a two
second pause, and the
computer beeps seven
times. Beeps continue for
five iterations after which
the LED flashes will
continue until the problem
is resolved.
Monitor does not function
properly when used with
energy saver features.
Dim characters.
Blurry video or requested
resolution cannot be set.
The picture is broken up,
rolls, jitters, or flashes.
Service Reference Guide, dc5700
Cause
System board failure
(ROM detected failure
prior to video.)
Monitor without energy
saver capabilities is
being used with energy
saver features enabled.
The brightness and
contrast controls are not
set properly.
Cables are not properly
connected.
If the graphics controller
was upgraded, the
correct video drivers
may not be loaded.
Monitor is not capable
of displaying requested
resolution.
Graphics card is bad.
The monitor connections
may be incomplete or
the monitor may be
incorrectly adjusted.
Monitor needs to be
degaussed.
437804-001
Troubleshooting Without Diagnostics
Solution
Replace the system board.
Disable monitor energy saver
feature.
Adjust the monitor brightness and
contrast controls.
Check that the graphics cable is
securely connected to the graphics
card and the monitor.
Install the video drivers included in
the upgrade kit.
Change requested resolution.
Replace the graphics card.
1. Be sure the monitor cable is
securely connected to the
computer.
2. In a two-monitor system or if
another monitor is in close
proximity, be sure the monitors
are not interfering with each
other's electromagnetic field by
moving them apart.
3. Fluorescent lights or fans may
be too close to the monitor.
Degauss the monitor.
D–17