Product Specific Problems - Dell U2722DX Service Manual

Product Specific Problems

Problem What You
Experience
Screen image is Image is
too small centered on
screen, but
does not fill
entire viewing
area
Cannot adjust OSD does not
the monitor appear on the
with the screen
buttons on the
front panel
No Input Signal No picture, the
when user LED light is
controls are white
pressed
The picture The picture
does not fill the cannot fill the
entire screen height or width
of the screen
No image Black screen
when using DP
connection to
the PC
No image when Black screen
using USB-C
connection
to computer,
laptop, and so
on
(U2722DE only)
6. Trouble Shooting Instructions
Possible Solutions
• Check the Aspect Ratio setting in the Display
menu OSD.
• Reset the monitor to factory settings.
• Turn off the monitor, unplug the monitor power
cable, plug it back, and then turn on the monitor.
• Check the signal source. Ensure the computer
is not in the power saving mode by moving the
mouse or pressing any key on the keyboard.
• Check whether the signal cable is plugged
in properly. Connect the signal cable again, if
necessary.
• Reset the computer or video player.
• Due to different video formats (aspect ratio) of
DVDs, the monitor may display in full screen.
• Run the built-in diagnostics.
• Verify which DP standard (DP 1.1a or DP 1.4) is
your Graphics Card certified to. Download and
install the latest graphics card driver.
• Some DP 1.1a graphics card cannot support
DP 1.4 monitors. Go to OSD menu, under Input
Source selection, press and hold DP select
Joystick key for 8 seconds to change the
monitor setting from DP 1.4 to DP 1.1a.
• Verify if the USB-C interface of the device can
support DP alternate mode.
• Verify if the device required more than 90 W
power charging.
• USB-C interface of device cannot support DP
alternate mode.
• Set Windows to Projection mode.
• Ensure that the USB-C cable is not damaged.