Dell UltraSharp 25 Monitor - Manual (Page 54)

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| Troubleshooting
4
Troubleshooting
WARNING: Before you begin any of the procedures in this section, follow the
Safety Instructions .
Self-Test
Your monitor provides a self-test feature that allows you to check whether your
monitor is functioning properly. If your monitor and computer are properly connected
but the monitor screen remains dark, run the monitor self-test by performing the
following steps:
1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer. To ensure proper Self-
Test operation, remove all Digital and the Analog cables from the back of
computer.
3. Turn on the monitor.
The floating dialog box should appear on-screen (against a black background), if the
monitor cannot sense a video signal and is working correctly. While in self-test mode,
the power LED remains white. Also, depending upon the selected input, one of the
dialogs shown below will continuously scroll through the screen.
Dell UltraSharp U2515H
or
Dell UltraSharp U2515H
or