Dell U2722DE Service Manual page 17

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Common
What You
Symptoms
Experience
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
6. Trouble Shooting Instructions
Possible Solutions
• 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.
• Try different Preset Modes in Color settings
OSD.
• Adjust R/G/B value under Custom Color in Color
menu OSD.
• Change the Input Color Format to RGB or
YCbCr in the Color settings OSD.
• Run the built-in diagnostics.
• Set the screen to turn off after a few minutes
of screen idle time. These can be adjusted in
Windows Power Options or Mac Energy Saver
setting.
• Alternatively, use a dynamically changing
screensaver.

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