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System Diagnostics and Troubleshooting150
Monitor does not function
properly when used with energy
saver features.
Monitor without energy
saver capabilities is being
used with energy saver
features enabled.
Disable monitor energy saver feature.
Dim characters. The brightness and contrast
controls are not set properly.
Adjust the monitor brightness and contrast controls.
Cables are not properly
connected.
Check that the graphics cable is securely connected
to the graphics card and the monitor.
Blurry video or requested
resolution cannot be set.
If the graphics controller was
upgraded, the correct video
drivers might not be loaded.
Install the video drivers included in the upgrade kit.
Monitor is not capable of
displaying requested
resolution.
Change requested resolution.
The picture is broken up, rolls,
jitters, or flashes.
The monitor connections
might be incomplete or the
monitor might be incorrectly
adjusted.
1. Be sure the monitor cable is securely connected
to the workstation.
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 might be too close to
the monitor.
Monitor must be degaussed. Degauss the monitor.
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 contrast
settings are too high.
Lower brightness and contrast settings.
Fuzzy focus; streaking, ghosting,
or shadowing effects; horizontal
scrolling lines; faint vertical bars;
or unable to center the picture
on the screen. (Flat panel
monitors using an analog VGA
input connection only.)
Flat panel monitor’s internal
digital conversion circuits
might be unable to correctly
interpret the output
synchronization of the
graphics card.
1. Select the monitor’s Auto-Adjustment option in
the monitor’s on-screen display menu.
2. Go to the HP Support Web site and check for an
updated display driver.
Certain typed symbols do not
appear correct.
The font you are using does
not support that particular
symbol.
Use the Character Map to locate the and select the
appropriate symbol. Click Start > All
Programs > Accessories > System Tools >
Character Map. You can copy the symbol from
the Character Map into a document.
Table 5-27 Display Problems (continued)
Problem Cause Solution