Dell U2720Q Users Guide - Page 53

Built-in Diagnostics, Button 4

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Built-in Diagnostics Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and video card. NOTE: You can run the built-in diagnostics only when the video cable is unplugged and the monitor is in self-test mode. 1234 5 To run the built-in diagnostics: 1 Make sure that the screen is clean (no dust particles on the surface of the screen). 2 Unplug the video cable(s) from the back of the computer or monitor. The monitor then goes into the self-test mode. 3 Press and hold Button 4 for 4 seconds in lock Select Option. Select the selfinspection icon and press , A gray screen appears. 4 Carefully inspect the screen for abnormalities. 5 Press Button 1 on the front panel again. The color of the screen changes to red. 6 Inspect the display for any abnormalities. 7 Repeat steps 5 and 6 to inspect the display in green, blue, black, white, and text screens. The test is complete when the text screen appears. To exit, press Button 1 again. If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card and computer. Troubleshooting | 53

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Troubleshooting
|
53
Built-in Diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality
you are experiencing is an inherent problem with your monitor, or with your computer and
video card.
NOTE:
You can run the built-in diagnostics only when the video cable is unplugged
and the monitor is in self-test mode.
3
4
5
1
2
To run the built-in diagnostics:
1
Make sure that the screen is clean (no dust particles on the surface of the screen).
2
Unplug the video cable(s) from the back of the computer or monitor. The monitor then
goes into the self-test mode.
3
Press and hold
Button 4
for 4 seconds in lock Select Option. Select the self-
inspection icon
and press
, A gray screen appears.
4
Carefully inspect the screen for abnormalities.
5
Press
Button 1
on the front panel again. The color of the screen changes to red.
6
Inspect the display for any abnormalities.
7
Repeat steps 5 and 6 to inspect the display in green, blue, black, white, and text
screens.
The test is complete when the text screen appears. To exit, press
Button 1
again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the
monitor is functioning properly. Check the video card and computer.