Dell P2415Q Monitor User Manual download pdf (Page 44)

44 | Troubleshooting

4 This box also appears during normal system operation, if the video cable becomes

disconnected or damaged.

5 Turn o your monitor and reconnect the video cable; then turn on both your

computer and the monitor.

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:

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 1 and Button 4 on the front panel simultaneously for 2

seconds. A gray screen appears.

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Dell P2415Q Monitor User Manual Page 44