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• Reset the monitor to factory settings.
Horizontal/
vertical lines
• Perform Auto Adjust through OSD.
Screen has
one or more
lines
• Adjust the Phase and Pixel Clock controls
through OSD.
• Perform monitor self-test feature check
(see Self-test) 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. For more
information, see Built-in diagnostics.
• When using HDMI/DisplayPort input, the
Pixel Clock and Phase adjustments are
not available.
• Reset the monitor to factory settings.
Synchronization
problems
• Perform Auto Adjust through OSD.
Screen is
scrambled or
appears torn
• Adjust the Phase and Pixel Clock controls
through OSD.
• Perform monitor self-test feature check
(see Self-test) 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.
Safety related
issues
• Contact Dell immediately.
Visible signs
of smoke or
sparks
Intermittent
problems
Monitor
malfunctions
on and off
• 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
(see Self-test) to determine if the
scrambled screen appears in self-test
mode.
Troubleshooting │ 91