Common Problems - Dell S2721HGF User Manual

Common problems

The following table contains 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
Missing Pixels
Stuck-on Pixels LCD screen has
Brightness
Problems
Safety Related
Issues
Intermittent
Problems
52 | Troubleshooting
What You Possible Solutions
Experience
No picture • Ensure that the video cable connecting the
• Verify that the power outlet is functioning
• Ensure that the power button is depressed fully.
• Ensure that the correct input source is selected
No picture or no • Increase brightness and contrast controls via
brightness
• Perform monitor 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
LCD screen has • Cycle power on-off.
spots • Pixel that is permanently off is a natural defect
• For more information on Dell Monitor Quality
• Cycle power On-Off.
bright spots • Pixel that is permanently off is a natural defect
• For more information on Dell Monitor Quality
Picture too dim • Reset the monitor to factory settings.
or too bright • Adjust brightness and contrast controls via OSD.
Visible signs of • Do not perform any troubleshooting steps.
smoke or sparks • Contact Dell immediately.
Monitor • Ensure that the video cable connecting the
malfunctions on
& off
• Reset the monitor to factory settings.
• Perform monitor self-test feature check to
monitor and the computer is properly connected
and secure.
properly using any other electrical equipment.
in the Input Source
OSD.
connector.
in the Input Source
that can occur in LCD technology.
and Pixel Policy, see Dell Support site at:
www.dell.com/pixelguidelines
that can occur in LCD technology.
and PixelPolicy, see Dell Support site at:
www.dell.com/pixelguidelines
monitor to the computer is connected properly
and is secure.
determine if the intermittent problem occurs in
self-test mode.
menu.
menu.
.
.