Dell UltraSharp U3821DW User Manual page 75

Missing Pixels
Stuck-on Pixels
Brightness
Problems
Geometric
Distortion
Horizontal/
Vertical Lines
LCD screen has
spots
LCD screen has
bright spots
Picture too dim or
too bright
Screen not
centered correctly
Screen has one or
more lines
• 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:
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 Pixel Policy, see Dell
Support site at:
pixelguidelines.
• Reset the monitor to factory settings.
• Adjust brightness & contrast controls
via OSD.
• Reset the monitor to factory settings.
• Reset the monitor to factory settings.
• Perform monitor self-test feature
check and determine if these lines are
also in self-test mode.
• Check for bent or broken pins in the
video cable connector.
• Run the built-in diagnostics.
Troubleshooting
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