Dell U3821DW 37.5" 21:9 Curved IPS Monitor (Silver) - Manual (Page 77)

Troubleshooting
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77
Product specific problems
Image retention
from a static
image left on the
monitor for a long
period of time Faint shadow
from the static
image displayed
appears on the
screen • 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.
Picture quality
(Refresh rate of
native resolution
changes from
60 Hz to 30 Hz;
or color depth
drops to 18 bits) Issues of incorrect
refresh rate or
missing colors • Set USB-C Prioritization to High
Resolution .
Common
symptoms
What you
experience
Possible solutions
Screen image is too
small Image is centered on
screen, but does not
fill entire viewing
area • Check the Aspect Ratio setting in
the Display menu OSD.
• Reset the monitor to factory settings.
Cannot adjust the
monitor with the
joystick OSD does not
appear on the screen • Turn Off the monitor, unplug the
power cord, plug it back, and then
turn On the monitor.
• Check whether the OSD menu is
locked. If yes, move and hold the
joystick up/down/left/right for 4
seconds to unlock (for more
information, see
Lock ).