HP Workstation z400

Problem Cause Solution
Monitor does not function
when used with Energy
Saver features.
Monitor without Energy
Saver capabilities is
being used with Energy
Saver features enabled.
Disable the 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.
Verify that the graphics cable is 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, or download and install the latest drivers for
your graphics card from
http://welcome.hp.com/country/us/en/
support.html.
Monitor cannot display
requested resolution.
Change the requested resolution.
The picture is broken up,
rolls, jitters, or flashes.
The monitor connections
might be faulty, or the
monitor might be
incorrectly adjusted.
1. Be sure the monitor cable is securely
connected to the workstation.
2. In a multiple CRT monitor system, ensure
that the monitors' electromagnetic fields
are not interfering with each other . Move
them apart if necessary.
3. Move fluorescent lights or fans that are too
close to the CRT 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 onscreen display
menu.
2. Manually synchronize the Clock and Clock
Phase onscreen display functions.
3. Download SoftPaq SP22333 to assist with
the synchronization).
Some typed symbols do not
appear correctly.
The font you are using
does not support that
symbol.
Use the Character Map to locate and select the
appropriate symbol.
Select Start>All Programs>
Accessories>System Tools>Character
Map. You can copy the symbol from the
Character Map into a document.
Table 11-5 Display problems (continued)
74 Chapter 11 Diagnostics and troubleshooting ENWW