Dell UltraSharp U2422H User Manual page 89

Brightness
Problems
Geometric
Distortion
Horizontal/
Vertical Lines
Synchronization
Problems
Safety Related
Issues
Intermittent
Problems
Picture too dim or
too bright
Screen not
centered correctly
Screen has one or
more lines
Screen is
scrambled or
appears torn
Visible signs of
smoke or sparks
Monitor
malfunctions on &
off
• 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.
• Reset the monitor to factory settings.
• Perform monitor self-test feature
check to determine if the scrambled
screen appears in self-test mode.
• Check for bent or broken pins in the
video cable connector.
• Restart the computer in the safe
mode.
• Do not perform any troubleshooting
steps.
• Contact Dell immediately.
• Ensure that the video cable
connecting the monitor to the
computer is connected properly and is
secure.
• Reset the monitor to factory settings.
• Perform monitor self-test feature
check to determine if the intermittent
problem occurs in self-test mode.
Troubleshooting
│
89