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Dell E2221HN Руководство пользователя

Common problems

The following table provides general information about common monitor problems
you might encounter and the possible solutions:
Common symptoms
No Video/Power LED off
No video/Power LED on
Poor focus
Shaky/Jittery video
Missing pixels
Stuck-on pixels
Brightness problems
Geometric distortion
Horizontal/Vertical lines
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42
Troubleshooting
• Ensure that the video cable connecting the monitor and the computer is
properly connected and secure.
• Verify that the power outlet is functioning properly using any other electrical
equipment.
• Ensure that the power button is pressed.
• Ensure that the correct input source is selected using the
• Increase brightness and contrast controls using the OSD.
• Perform monitor self-test feature check.
• Check for bent or broken pins in the video cable connector.
• Run the built-in diagnostics.
• Ensure that the correct input source is selected using the
• Eliminate video extension cables.
• Reset the monitor to Factory Settings (Factory Reset).
• Change the video resolution to the correct aspect ratio.
• Reset the monitor to Factory Settings (Factory Reset).
• 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 about Dell Monitor Quality and Pixel Policy, see Dell
Support site at
https://www.dell.com/support/monitors.
• Cycle power On-off.
• Pixel that is permanently off 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:
https://www.dell.com/support/monitors.
• Reset the monitor to Factory Settings (Factory Reset).
• Adjust brightness and contrast controls using OSD.
• Reset the monitor to Factory Settings (Factory Reset).
• Adjust horizontal and vertical controls using OSD.
• Reset the monitor to Factory Settings (Factory Reset).
• 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.
Possible solutions
Input Source
menu.
Input Source
menu.