Dell UltraScan P990 Benutzerhandbuch Seite 27

Table 3-6. Troubleshooting Problems (continued)
Symptom
Two fine horizontal
lines (wires) are visi-
ble
Hum is heard right
after the power is
turned on
White does not look
white
Check these items
•
These Damper wires stabilize the vertically striped aper-
ture grille (page 1-15). This aperture grille allows more
light to pass through to the screen giving the Trinitron
CRT more color and brightness.
•
When the power is turned on, the auto-degauss cycle is
activated. While the auto-degauss cycle is activated, a
hum may be heard. The same hum is heard when the
monitor is manually degaussed. This is not a
malfunction.
•
Adjust the color temperature using the COLOR OSD
(page 1-8).
Troubleshooting 1-19