HP Compaq dx7200 MT Reference Manual page 189

Solving Display Problems (Continued)
Problem
Image is not centered.
"No Connection, Check
Signal Cable" displays on
screen.
"Out of Range" displays on
screen.
Vibrating or rattling noise
coming from inside a CRT
monitor when powered on.
Clicking noise coming from
inside a CRT monitor.
High pitched noise coming
from inside a flat panel
monitor.
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)
Certain typed symbols do
not appear correct.
Service Reference Guide, dx7200
Cause
Position may need
adjustment.
Monitor video cable is
disconnected.
Video resolution and
refresh rate are set
higher than what the
monitor supports.
Monitor degaussing coil
has been activated.
Electronic relays have
been activated inside
the monitor.
Brightness and/or
contrast settings are too
high.
Flat panel monitor's
internal digital
conversion circuits may
be unable to correctly
interpret the output
synchronization of the
graphics card.
Graphics card is not
seated properly or is
bad.
The font you are using
does not support that
particular symbol.
390812-001
Troubleshooting Without Diagnostics
Solution
Press the Menu button to access the
OSD menu. Select
ImageControl/Horizontal
Position or VerticalPosition to
adjust the horizontal or vertical
position of the image.
Connect the video cable between
the monitor and computer.
Ä Ensure the computer power is
off while connecting the video
cable.
Restart the computer and enter Safe
Mode. Change the settings to a
supported setting then restart the
computer so that the new settings
take effect.
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.
Lower brightness and/or contrast
settings.
1. Select the monitor's
Auto-Adjustment option in the
monitor's on-screen display
menu.
2. Manually synchronize the Clock
and Clock Phase on-screen
display functions. Download
SoftPaq SP20930 or SP22333,
depending on the monitor, to
assist with the synchronization.
1. Reseat the graphics card.
2. Replace the graphics card.
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.
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