Monitor Self Test; Troubleshooting - Dell UltraScan P990 Benutzerhandbuch

Monitor Self Test

NO PICTURE: If the monitor fails to display an image, test the monitor by using the SELF
TEST function as described below.
1. Turn off the monitor and disconnect the video cable from the computer
system.
2. Turn on the monitor and wait five seconds.
The "MONITOR IS WORKING – CHECK SIGNAL CABLE" message should appear
with a color bar pattern. The message and pattern are displayed for 30 seconds.
If the monitor displays White, Red, Green and Blue, the monitor is functioning properly.

Troubleshooting

This section may help you isolate the cause of a problem and as a result, eliminate the
need to contact technical support.
Table 3-6. Troubleshooting Problems
Symptom
No picture
If the 1 indicator is
not lit
If the "CHECK SIG-
NAL CABLE" mes-
sage appears on the
screen, or if the 1
indicator is either
orange or alternating
between green and
orange
If the "OUT OF SCAN
RANGE" message
appears on the
screen
If no message is dis-
played and the 1 indi-
cator is green or
flashing orange
1-16 Dell Model UltraScan P990 Color Monitor User's Guide
Check these items
•
Make sure the power cord is properly connected.
•
Make sure the 1 (POWER) switch is in the "ON"
position.
•
Make sure the video signal cable is properly connected
and all plugs are firmly seated in their sockets.
•
Make sure none of the HD15 video input connector pins
are bent or pushed in.
•
Make sure the video board is completely seated in the
proper bus slot.
•
If you are using a video signal cable adapter, make sure
it is the correct type.
•
Make sure the video frequency range is within that
specified for the monitor.
Horizontal: 30 – 96 kHz
Vertical: 48 – 120 Hz
Refer to your computer system's instruction manual to
adjust the video frequency range.
•
Run the MONITOR SELF TEST function: (see above)
•
Make sure none of the HD15 video input connector pins
are bent or pushed in.