Dell P2014H Monitor - Manual (Page 25)

48  Operating the Monitor Operating the Monitor  49
Troubleshooting
CAUTION: 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 both Digital (white connector) and
the Analog (blue connector) 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 blue. Also,
depending upon the selected input, one of the dialogs shown below will
continuously scroll through the screen.
or
or
4. This box also appears during normal system operation, if the video
cable becomes disconnected or damaged.
5. Turn off 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. Ensure 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 the Button 1 and Button 4 on the front panel
simultaneously for 2 seconds. A gray screen appears.
4. Carefully inspect the screen for abnormalities.
5. Press the Button 4 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
screens.
The test is complete when the white screen appears. To exit, press the Button
4 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.