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 Messages.
Common Problems
The following table contains general information about common monitor problems you might encounter.
Common Symptoms
What You Experience
Possible Solutions
No Video/Power LED off
No picture
l
Ensure that the video cable connecting the monitor and the computer is properly connected and secure.
l
Verify that the power outlet is functioning properly using any other electrical equipment.
lEnsure that the power button is depressed fully.
No Video/Power LED on
No picture or no brightness
lIncrease brightness & contrast controls via OSD.
lPerform monitor self-test feature check.
lCheck for bent or broken pins in the video cable connector.
lEnsure that the correct input source is selected via the Input Source Select button.
lRun the built-in diagnostics.
Poor Focus
Picture is fuzzy, blurry, or
ghosting
lPerform Auto Adjust via OSD.
lAdjust the Phase and Pixel Clock controls via OSD.
lEliminate video extension cables.
lReset the monitor to Factory Settings.
lChange the video resolution to the correct aspect ratio (16:10).
Shaky/Jittery Video
Wavy picture or fine
movement
lPerform Auto Adjust via OSD.
lAdjust the Phase and Pixel Clock controls via OSD.
lReset the monitor to Factory Settings.
lCheck environmental factors.
lRelocate the monitor and test in another room.
Missing Pixels
LCD screen has spots
lCycle power on-off.
lPixel that is permanently off is a natural defect that can occur in LCD technology.
For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at:
support.dell.com
Stuck-on Pixels
LCD screen has bright
spots
lCycle power on-off.
lPixel that is permanently off is a natural defect that can occur in LCD technology.
For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at:
support.dell.com
Brightness Problems
Picture too dim or too
bright
lReset the monitor to Factory Settings.
lAuto Adjust via OSD.
lAdjust brightness & contrast controls via OSD.
Geometric Distortion
Screen not centered
correctly
lReset the monitor to Factory Settings.
lAuto Adjust via OSD.
lAdjust brightness & contrast controls via OSD.
NOTE: When using 'DVI-D', the positioning adjustments are not available.
Horizontal/Vertical Lines
Screen has one or more
lines
lReset the monitor to Factory Settings.
lPerform Auto Adjust via OSD.