Dell S2421HN User Manual page 53

Common What you
symptoms experience
Safety Related Visible signs of
Issues smoke or sparks
Intermittent Monitor
Problems malfunctions on
& off
Missing Color Picture missing
color
Wrong Color Picture color
not good
Image retention Faint shadow
from a static from the static
image left on image displayed
the monitor for appears on the
a long period of screen
time
Possible solutions
• Do not perform any troubleshooting steps.
• Contact Dell immediately.
• Ensure that the video cable connecting the
monitor to the computer is connected properly
and is secure.
• Reset the monitor to factory settings.
• Perform monitor self-test feature check to
determine if the intermittent problem occurs in
self-test mode.
• Perform monitor self-test.
• Ensure that the video cable connecting the
monitor to the computer is connected properly
and is secure.
• Check for bent or broken pins in the video cable
connector.
• Change the settings of the Preset Modes
in the Color menu OSD depending on the
application.
• Adjust R/G/B value under Custom Color in
Color menu OSD.
• Change the Input Color Format to PC RGB or
YPbPr in the Color menu OSD.
• Run the built-in diagnostics.
• Use the Power Management feature to turn
off the monitor at all times when not in use
(for more information, see
modes).
• Alternatively, use a dynamically changing
screensaver.
Power management
Troubleshooting | 53