Dell U2415 Monitor - Manual (Page 57)

Troubleshooting | 57
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 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.
or
or