HP Compaq d330 DT Troubleshooting Manual page 35

Solving Display Problems (Continued)
Problem
Dim characters.
(continued)
Blurry video or requested
resolution cannot be set.
The picture is broken up, or
it rolls, jitters, or flashes.
Vibrating or rattling noise
coming from inside a CRT
monitor when powered on.
Clicking noise coming from
inside a CRT monitor.
Troubleshooting Guide
Cause
Cables are not properly
connected.
If the graphics controller
was upgraded, the
correct graphics drivers
may not be loaded.
Monitor is not capable
of displaying requested
resolution.
The monitor connections
may be incomplete or
the monitor may be
incorrectly adjusted.
Monitor needs to be
degaussed.
Monitor degaussing coil
has been activated.
Electronic relays have
been activated inside
the monitor.
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Troubleshooting Without Diagnostics
Solution
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.
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. Refer to the
documentation that came with the
monitor for instructions.
None. It is normal for the
degaussing coil to be activated
when the monitor is powered on.
None. It is normal for some monitors
to make a clicking noise when
turned on and off, when going in
and out of standby mode, and when
changing resolutions.
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