Dell P5524QT 55" UHD 4K Touchscreen Commercial Monitor - Manual (Page 68)

68 | Troubleshooting
Common problems
The following table contains general information about common display problems you
might encounter and the possible solutions:
Common
Symptoms What You
Experience Possible Solutions
No Video/
Power LED off No picture • Ensure that the video cable connecting the
display 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.
• Ensure that the correct input source is selected
in the Input Source menu.
No Video/
Power LED on No picture or no
brightness • Increase brightness & contrast controls via
OSD.
• Perform display self-test feature check.
• Check for bent or broken pins in the video
cable connector.
• Run the built-in diagnostics.
• Ensure that the correct input source is selected
in the Input Source menu.
Poor Focus Picture is
fuzzy, blurry, or
ghosting • Eliminate video extension cables.
• Reset the display to factory settings.
• Change the video resolution to the correct
aspect ratio.
Shaky/Jittery
Video Wavy picture or
fine movement • Reset the display to factory settings.
• Check environmental factors.
• Relocate the display and test in another room.
Missing Pixels LCD screen has
spots • Cycle power on-off.
• Pixel that is permanently off is a natural defect
that can occur in LCD technology.
• For more information on Dell Display Quality
and Pixel Policy, see Dell Support site at:
http://www.dell.com/support/monitors .