Dell P2723QE 27" 4K UHD USB Type-C Hub Monitor - Manual (Page 73)

Troubleshooting │ 73
Common problems
The following table provides 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 pressed 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 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 the Input Source menu.
No video/
at HDMI/
DisplayPort/
USB-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-C cable
from dongle/docking device, then plug the
docking Thunderbolt cable to the notebook.
Plug the HDMI/DisplayPort/USB-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 about Dell Monitor Quality
and Pixel Policy, see Dell support site at:
http://www.dell.com/pixelguidelines .