Dell S2421Ho User Manual page 54

Common
symptoms
Brightness
problems
Safety-related
issues
Intermittent
problems
Missing color
Wrong color
Image retention
from a static
image left on
the monitor for
a long period of
time
54 | Troubleshooting
What you Possible solutions
experience
Picture too dim • Reset the monitor to factory settings.
or too bright
• Adjust brightness and contrast controls through
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
and off
• Reset the monitor to factory settings.
• Perform monitor self-test feature check to
Picture missing • Perform monitor self-test.
color
• Ensure that the video cable connecting the
• Check for bent or broken pins in the video cable
Picture color • Change the settings of the Preset Modes
not good
• Adjust R/G/B value under Custom Color in
• Change the Input Color Format to PC RGB or
• Run the built-in diagnostics.
Faint shadow • Set the screen to turn off after a few minutes
from the static
image displayed
appears on the
screen
• Alternatively, use a dynamically changing
OSD.
monitor to the computer is connected properly
and is secure.
determine if the intermittent problem occurs in
self-test mode.
monitor to the computer is connected properly
and is secure.
connector.
in the Color menu OSD depending on the
application.
Color menu OSD.
YPbPr in the Color menu OSD.
of screen idle time. These can be adjusted in
Windows Power Options or Mac Energy Saver
setting.
screensaver.