Built-In Diagnostics - Dell S2418HN User Manual

If your monitor screen remains blank after you use the previous procedure, check your
video controller and computer, because your monitor is functioning properly.

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.
To run the built-in diagnostics:
Make sure that the screen is clean (no dust particles on the surface of the screen).
1
Unplug the video cable(s) from the back of the computer or monitor. The monitor
2
then goes into the self-test mode.
Press and hold Button 1 for 5 seconds. A gray screen appears.
3
Carefully inspect the screen for abnormalities.
4
Press Button 1 on the front panel again. The color of the screen changes to red.
5
Inspect the display for any abnormalities.
6
Repeat steps 5 and 6 to inspect the display in green, blue, black, white, and text
7
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
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