Dell S2240T 21.5 Dell S2240T Users Guide - Page 46

Troubleshooting, For more information on Dell Monitor Quality and Pixel

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Poor Focus Picture is fuzzy, blurry, or ghosting • Perform Auto Adjust via OSD. • Adjust the Phase and Pixel Clock controls via OSD. • Eliminate video extension cables. • Reset the monitor to Factory Settings. • Change the video resolution to the correct aspect ratio (16:9). Shaky/Jittery Video Wavy picture or fine movement • Perform Auto Adjust via OSD. • Adjust the Phase and Pixel Clock controls via OSD. • Reset the monitor to Factory Settings. • Check environmental factors. • Relocate the monitor and test in another room. Missing Pixels LCD screen has spots • 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: support.dell.com. Stuck-on Pixels LCD screen has bright spots • 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: support.dell.com. Brightness Problems Picture too dim or too bright • Reset the monitor to Factory Settings. • Auto Adjust via OSD. • Adjust brightness & contrast controls via OSD. Geometric Distortion Screen not centered correctly • Reset the monitor to Factory Settings. • Auto Adjust via OSD. • Adjust horizontal & vertical controls via OSD. NOTE: When using DVI-D/HDMI input, the positioning adjustments are not available. Horizontal/ Vertical Lines Screen has one or more lines • Reset the monitor to Factory Settings. • Perform Auto Adjust via OSD. • Adjust Phase and Pixel Clock controls via OSD. • 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. NOTE: When using DVI-D/HDMI input, the Pixel Clock and Phase adjustments are not available. Synchronization Screen is Problems scrambled or appears torn • Reset the monitor to Factory Settings. • Perform Auto Adjust via OSD. • Adjust Phase and Pixel Clock controls via OSD. • 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. 46 | Troubleshooting

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Poor Focus
Picture is fuzzy,
blurry, or
ghosting
•
Perform
Auto Adjust
via OSD.
•
Adjust the
Phase
and
Pixel Clock
controls via OSD.
•
Eliminate video extension cables.
•
Reset the monitor to
Factory Settings
.
•
Change the video resolution to the correct aspect ratio
(16:9).
Shaky/Jittery
Video
Wavy picture or
fine movement
•
Perform
Auto Adjust
via OSD.
•
Adjust the
Phase
and
Pixel Clock
controls via OSD.
•
Reset the monitor to
Factory Settings
.
•
Check environmental factors.
•
Relocate the monitor and test in another room.
Missing Pixels
LCD screen has
spots
•
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:
support.dell.com
.
Stuck-on Pixels
LCD screen has
bright spots
•
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:
support.dell.com
.
Brightness
Problems
Picture too dim
or too bright
•
Reset the monitor to
Factory Settings
.
• Auto Adjust
via OSD.
•
Adjust brightness & contrast controls via OSD.
Geometric
Distortion
Screen not
centered
correctly
•
Reset the monitor to
Factory Settings
.
• Auto Adjust
via OSD.
•
Adjust horizontal & vertical controls via OSD.
NOTE:
When using DVI-D/HDMI input, the positioning
adjustments are not available.
Horizontal/
Vertical Lines
Screen has one
or more lines
•
Reset the monitor to
Factory Settings
.
•
Perform
Auto Adjust
via OSD.
•
Adjust
Phase
and
Pixel Clock
controls via OSD.
•
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.
NOTE:
When using DVI-D/HDMI input, the
Pixel Clock
and
Phase
adjustments are not available.
Synchronization
Problems
Screen is
scrambled or
appears torn
•
Reset the monitor to
Factory Settings
.
•
Perform
Auto Adjust
via OSD.
•
Adjust
Phase
and
Pixel Clock
controls via OSD.
•
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
.
46
|
Troubleshooting