Dell E1911c Manuel de l'utilisateur - Page 32

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Dell E1911c Manuel de l'utilisateur
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.

Common Problems

The following table contains general information about common monitor problems you might encounter.
Common Symptoms
No Video/Power LED off
No Video/Power LED on
Poor Focus
Shaky/Jittery Video
Missing Pixels
Stuck-on Pixels
Brightness Problems
What You Experience
No picture
No picture or no brightness
Picture is fuzzy, blurry, or ghosting
Wavy picture or fine movement
LCD screen has spots
LCD screen has bright spots
Picture too dim or too bright
Ensure that the video cable connecting the monitor and the computer is properly connected
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and secure.
Verify that the power outlet is functioning properly using any other electrical equipment.
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Ensure that the power button is depressed fully.
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Increase brightness & contrast controls via OSD.
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Perform monitor self-test feature check.
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Check for bent or broken pins in the video cable connector.
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Touch button 5 located above the power button, ensure that the correct input source is
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selected via the
Input Source Select
Run the built-in diagnostics.
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Perform Auto Adjust via OSD.
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Adjust the Phase and Pixel Clock controls via OSD.
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Eliminate video extension cables.
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Reset the monitor to Factory Settings.
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Change the video resolution to the correct aspect ratio (16:10).
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Perform Auto Adjust via OSD.
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Adjust the Phase and Pixel Clock controls via OSD.
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Reset the monitor to Factory Settings.
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Check environmental factors.
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Relocate the monitor and test in another room.
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Cycle power on-off.
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Pixel that is permanently off is a natural defect that can occur in LCD technology.
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For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at:
support.dell.com.
Cycle power on-off.
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Pixel that is permanently off is a natural defect that can occur in LCD technology.
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For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at:
support.dell.com.
Reset the monitor to Factory Settings.
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Possible Solutions
menu.