Users Guide

56 Troubleshooting
Missing pixels LCD screen has spots • Cycle power on-o.
• Pixel that is permanently o is a
natural defect that can occur in LCD
technology.
For more information about Dell
Monitor Quality and Pixel Policy, see
Dell Support site at:
http://www.dell.com/support/monitors.
Stuck-on pixels
LCD screen has bright
spots
• Cycle power on-o.
• Pixel that is permanently o is a
natural defect that can occur in LCD
technology.
For more information about Dell
Monitor Quality and Pixel Policy, see
Dell Support site at:
http://www.dell.com/support/monitors.
Brightness problems Picture too dim or too
bright
• Reset the monitor to Factory Settings.
• Auto Adjust via OSD.
• Adjust brightness and contrast
controls using OSD.
Geometric distortion Screen not centered
correctly
• Reset the monitor to Factory Settings.
• Auto Adjust via OSD.
• Adjust horizontal and vertical controls
using OSD.
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.
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.