4. Carefully inspect the screen for abnormalities.
5. Press the shortcut key 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, and white colored screens.
The test is complete when the white screen appears. To exit, press the shortcut key 4 key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 and the possible solutions.
Common Symptoms
What You See
Possible Solutions
No Video/Power LED
off
No picture
lEnsure that the video cable connecting the monitor and the computer is properly connected and secure.
lVerify that the power outlet is functioning properly using any other electrical equipment.
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.
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 (16:9).
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.
lRun the built-in diagnostics
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.
lRun the built-in diagnostics
Brightness Problems
Picture is too dim or
too bright
lReset the monitor to Factory Settings.
lAuto Adjust via OSD.
lAdjust brightness & contrast controls via OSD.
Geometric Distortion
Screen is not
centered correctly
lReset the monitor to Factory Settings.
lAuto Adjust via OSD.
lAdjust brightness & contrast controls via OSD.
NOTE: When using 'DVI-D' or 'HDMI', 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.
lAdjust Phase and Pixel Clock controls via OSD.
lPerform monitor self-test feature check and determine if these lines are also in self-test mode.
lCheck for bent or broken pins in the video cable connector.
lRun the built-in diagnostics
NOTE: When using 'DVI-D' or 'HDMI', the Pixel Clock and Phase adjustments are not available.
Synchronization
Problems
Screen is scrambled
or appears torn
lReset the monitor to Factory Settings.
lPerform Auto Adjust via OSD.
lAdjust Phase and Pixel Clock controls via OSD.
lPerform monitor self-test feature check to determine if the scrambled screen appears in self-test mode.
lCheck for bent or broken pins in the video cable connector.
lRestart the computer in the safe mode.
Safety Related
Issues
Visible signs of
smoke or sparks
lDo not perform any troubleshooting steps.
lContact Dell immediately.
Intermittent
Problems
Monitor malfunctions
on & off
lEnsure that the video cable connecting the monitor to the computer is connected properly and is secure.
lReset the monitor to Factory Settings.
lPerform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.