Dell UltraSharp U2711 Manual del usuario - Página 40
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4. Carefully inspect the screen for abnormalities.
5. Touch the button 4 key 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, and white colored screens.
The test is complete when the white screen appears. To exit, touch 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.
OSD Warning Messages
For OSD-related issues, see
OSD Warning
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
Geometric Distortion
Horizontal/Vertical Lines
Messages.
What You Experience
No picture
l
l
l
No picture or no brightness
l
l
l
l
l
Picture is fuzzy, blurry, or
l
ghosting
l
l
l
l
Wavy picture or fine
l
movement
l
l
l
l
LCD screen has spots
l
l
For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com
LCD screen has bright
l
spots
l
For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: support.dell.com
Picture too dim or too
l
bright
l
l
Screen not centered
l
correctly
l
l
NOTE:
Screen has one or more
l
lines
l
Ensure that the video cable connecting the monitor and the computer is properly connected and secure.
Verify that the power outlet is functioning properly using any other electrical equipment.
Ensure that the power button is depressed fully.
Increase brightness & contrast controls via OSD.
Perform monitor self-test feature check.
Check for bent or broken pins in the video cable connector.
Ensure that the correct input source is selected via the
Run the built-in diagnostics.
Perform Auto Adjust via OSD.
Adjust the Phase and Pixel Clock controls via OSD.
Eliminate video extension cables.
Reset the monitor to Factory Settings.
Change the video resolution to the correct aspect ratio (16:10).
Perform Auto Adjust via OSD.
Adjust the Phase and Pixel Clock controls via OSD.
Reset the monitor to Factory Settings.
Check environmental factors.
Relocate the monitor and test in another room.
Cycle power on-off.
Pixel that is permanently off is a natural defect that can occur in LCD technology.
Cycle power on-off.
Pixel that is permanently off is a natural defect that can occur in LCD technology.
Reset the monitor to Factory Settings.
Auto Adjust via OSD.
Adjust brightness & contrast controls via OSD.
Reset the monitor to Factory Settings.
Auto Adjust via OSD.
Adjust brightness & contrast controls via OSD.
When using 'DVI-D', the positioning adjustments are not available.
Reset the monitor to Factory Settings.
Perform Auto Adjust via OSD.
Possible Solutions
Input Source Select
button.