Troubleshooting Guide

2–22 www.hp.com Troubleshooting Guide
Troubleshooting Without Diagnostics
The picture is broken up,
rolls, jitters, or flashes.
The monitor
connections may be
incomplete or the
monitor may be
incorrectly adjusted.
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.
Monitor needs to be
degaussed.
Degauss the monitor. Refer to the
documentation that came with the
monitor for instructions.
Vibrating or rattling noise
coming from inside a CRT
monitor when powered on.
Monitor degaussing
coil has been activated.
None. It is normal for the
degaussing coil to be activated
when the monitor is powered on.
Clicking noise coming from
inside a CRT monitor.
Electronic relays have
been activated inside
the monitor.
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.
High pitched noise coming
from inside a flat panel
monitor.
Brightness and/or
contrast settings are too
high.
Lower brightness and/or contrast
settings.
Solving Display Problems (Continued)
Problem Cause Solution