Dell S2240T User Manual page 46

Poor Focus Picture is fuzzy,
blurry, or
ghosting
Shaky/Jittery Wavy picture or
Video fine movement
Missing Pixels LCD screen has
spots
Stuck-on Pixels LCD screen has
bright spots
Brightness Picture too dim
Problems or too bright
Geometric Screen not
Distortion centered
correctly
Horizontal/ Screen has one
Vertical Lines or more lines
Synchronization Screen is
Problems scrambled or
appears torn
46
| Troubleshooting
• 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).
• 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.
• 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.
• 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.
• Reset the monitor to Factory Settings.
• Auto Adjust via OSD.
• Adjust brightness & contrast controls via OSD.
• 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.
• 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.
• 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.