Common Problems - Dell U2723QE Service Manual

Common problems

The following table contains general information about common monitor problems you
might encounter and the possible solutions:
Common What you
symptoms experience
No Video/ No picture
Power LED off
No Video/ No picture or no
Power LED on brightness
Missing Pixels LCD screen has
spots
Stuck-on Pixels LCD screen has
bright spots
Brightness Picture too dim
Problems or too bright
Safety Related Visible signs of
Issues smoke or sparks
6. Trouble Shooting Instructions
Possible solutions
• 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.
• Ensure that the correct input source is selected
in the Input Source
• Increase brightness and contrast controls via
OSD.
• Perform monitor 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
• Cycle power on-off.
• Pixel 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:
https://www.dell.com/pixelguidelines.
• Cycle power On-Off.
• Pixel that is permanently off is a natural defect
that can occur in LCD technology.
• For more information on Dell Monitor Quality and
PixelPolicy, see Dell Support site at:
https://www.dell.com/pixelguidelines.
• Reset the monitor to factory settings.
• Adjust brightness and contrast controls via OSD.
• Do not perform any troubleshooting steps.
• Contact Dell immediately.
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