Dell C5518QT, Руководство пользователя

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60 | Troubleshooting
Common Problems
The following table contains general information about common display problems you might
encounter and the possible solutions:
NOTE:
Auto Adjust function is
applicable to VGA input
only.
Common
Symptoms
What You
Experience
Possible Solutions
No Video/Power
LED off
No picture • Ensure that the video cable connecting the display
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 depressed fully.
• Ensure that the correct input source is selected in the
Input Source menu.
No Video/Power
LED on
No picture or no
brightness
• Increase brightness & contrast controls via OSD.
• Perform display 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 in the
Input Source menu.
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 display to factory settings.
• Change the video resolution to the correct aspect ratio.
Shaky/Jittery Video Wavy picture or fine
movement
• Perform Auto Adjust via OSD.
• Adjust the Phase and Pixel Clock controls via OSD.
• Reset the display to factory settings.
• Check environmental factors.
• Relocate the display 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 Display 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-Off.
• Pixel that is permanently off is a natural defect
that can occur in LCD technology.
• For more information on Dell Display Quality
and PixelPolicy, see Dell Support site at:
http://www.dell.com/support/monitors .