Dell U2422HE Users Guide - Page 89

Contact Dell immediately., Vertical Lines

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Brightness Problems Geometric Distortion Horizontal/ Vertical Lines Synchronization Problems Safety Related Issues Intermittent Problems Picture too dim or • Reset the monitor to factory settings. too bright • Adjust brightness & contrast controls via OSD. Screen not • Reset the monitor to factory settings. centered correctly Screen has one or more lines • 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. Screen is scrambled or appears torn • 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. Visible signs of • Do not perform any troubleshooting smoke or sparks steps. • Contact Dell immediately. Monitor • Ensure that the video cable malfunctions on & connecting the monitor to the off 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

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Troubleshooting± ±
│
± ± 89
Brightness
Problems
Picture too dim or
too bright
•
Reset the monitor to factory settings.
•
Adjust brightness & contrast controls
via OSD.
Geometric
Distortion
Screen not
centered correctly
•
Reset the monitor to factory settings.
Horizontal/
Vertical Lines
Screen has one or
more lines
•
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.
Synchronization
Problems
Screen is
scrambled or
appears torn
•
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.
Safety Related
Issues
Visible signs of
smoke or sparks
•
Do not perform any troubleshooting
steps.
•
Contact Dell immediately.
Intermittent
Problems
Monitor
malfunctions on &
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 to determine if the intermittent
problem occurs in self-test mode.