HP Compaq d330 DT Troubleshooting Manual page 36

Troubleshooting Without Diagnostics
Solving Display Problems (Continued)
Problem
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.
2–20
Cause
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.
The font you are using
does not support that
particular symbol.
www.hp.com
Solution
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. To download
a SoftPaq that will assist you
with the synchronization, go to
the following Web site, select
the appropriate monitor, and
download either SP20930 or
SP22333:
www.hp.com/support
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.
Troubleshooting Guide