Dell P2225H User Manual page 91

Horizontal/
vertical lines
Synchronization
problems
Safety related
issues
Intermittent
problems
Screen has • Reset the monitor to factory settings.
one or more
• Perform Auto Adjust through OSD.
lines
• Adjust the Phase and Pixel Clock controls
• Perform monitor self-test feature check
• Check for bent or broken pins in the video
• Run the built-in diagnostics. For more
• When using HDMI/DisplayPort input, the
Screen is • Reset the monitor to factory settings.
scrambled or
• Perform Auto Adjust through OSD.
appears torn
• Adjust the Phase and Pixel Clock controls
• Perform monitor self-test feature check
• Check for bent or broken pins in the video
• Restart the computer in the safe mode.
Visible signs • Do not perform any troubleshooting steps.
of smoke or
• Contact Dell immediately.
sparks
Monitor • Ensure that the video cable connecting the
malfunctions
on and off
• Reset the monitor to factory settings.
• Perform monitor self-test feature check
through OSD.
(see Self-test) and determine if these lines
are also in self-test mode.
cable connector.
information, see Built-in
Pixel Clock and Phase adjustments are
not available.
through OSD.
(see Self-test) to determine if the
scrambled screen appears in self-test
mode.
cable connector.
monitor to the computer is connected
properly and is secure.
(see Self-test) to determine if the
scrambled screen appears in self-test
mode.
Troubleshooting
diagnostics.
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