Common Problems - Dell C8621QT User Manual

Common Problems

The following table contains general information about common display 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 Wavy picture or fine
Missing Pixels
Stuck-on Pixels
Brightness
Problems
Audio problem
What You Possible Solutions
Experience
No picture • Ensure that the video cable connecting the display
• Verify that the power outlet is functioning properly
• Ensure that the power button is depressed fully.
• Ensure that the correct input source is selected in the
No picture or no • Increase brightness & contrast controls via OSD.
brightness • Perform display self-test feature check.
• Check for bent or broken pins in the video cable
• Run the built-in diagnostics.
• Ensure that the correct input source is selected in the
Picture is fuzzy, • Eliminate video extension cables.
blurry, or ghosting • Reset the display to factory settings.
• Change the video resolution to the correct aspect ratio.
• Reset the display to factory settings.
movement • Check environmental factors.
• Relocate the display and test in another room.
LCD screen has • Cycle power on-off.
spots • Pixel that is permanently off is a natural defect
• For more information on Dell Display Quality
LCD screen has • Cycle power On-Off.
bright spots • Pixel that is permanently off is a natural defect
• For more information on Dell Display Quality
Picture too dim or • Reset the display to factory settings.
too bright • Adjust brightness & contrast controls via OSD.
No Audio • Check PC setting if the playback is correctly selected.
• Checking other video cables.
• Ensure that the Speaker is enabled via OSD
and the computer is properly connected and secure.
using any other electrical equipment.
Input Source menu.
connector.
Input Source menu.
that can occur in LCD technology.
and Pixel Policy, see Dell Support site at:
http://www.dell.com/support/monitors.
that can occur in LCD technology.
and PixelPolicy, see Dell Support site at:
http://www.dell.com/support/monitors.
Troubleshooting | 59