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| Troubleshooting
Common Problems
The following table contains general information about common monitor problems you might
encounter and the possible solutions:
Common
Symptoms
What You
Experience
Possible Solutions
No Video/Power
LED off
No picture
• 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 depressed fully.
• Ensure that the correct input source is selected in
No Video/Power
LED on
No picture or no
brightness
• Increase brightness and contrast controls via 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 in
No video
at HDMI/
DisplayPort/USB
Type-C port
When connected
to some dongle/
docking device
at the port,
there is no video
when unpluging/
pluging the
Thunderbolt
cable from the
notebook
• Unplug the HDMI/DisplayPort/USB Type C cable
from dongle/docking device, then plug the docking
Thunderbolt cable to the notebook. Plug the HDMI/
DisplayPort/USB Type-C cable 7 seconds later.
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 Monitor Quality
and Pixel Policy, see Dell Support site at:
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 Monitor Quality
and PixelPolicy, see Dell Support site at:
www.dell.com/support/monitors
.
Brightness
Problems
Picture too dim
or too bright
• Reset the monitor to factory settings.
• Adjust brightness and contrast controls via OSD.
Safety Related
Issues
Visible signs of
smoke or sparks
• Do not perform any troubleshooting steps.
• Contact Dell immediately.
