Dell U4320Q Simplified Service Manual page 16

Problem What you
experience
Cannot adjust OSD does not
the monitor with appear on the
the buttons on screen
the front panel
No Input Signal No picture, the
when user LED light is white
controls are
pressed
The picture does The picture
not fill the entire cannot fill the
screen height or width
of the screen
No image Black screen
when using
USB Type-C
connection
to computer,
laptop, and so on
No charging No charging
when using
USB Type-C
connection
to computer,
laptop, and so on
Intermittent Intermittent
charging charging
when using
USB Type-C
connection to
computer,
laptop, and so on
No image Black screen
when using DP
connection to
the PC
5. Trouble Shooting Instructions
Possible solutions
• 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 if the USB Type-C interface of the device can
support DP alternate mode.
• Verify if the device required more than 65 W power
charging.
• USB Type-C interface of device cannot support DP
alternate mode.
• Set Windows to Projection mode.
• Ensure that the USB Type-C cable is not damaged.
• Verify if the device can support one of 5 V/9 V/15
V/20 V charging profiles.
• Verify if the Notebook requires a >65 W power
adaptor.
• If the Notebook requires a >65 W power adaptor, it
may not charge with the USB Type-C connection.
• Ensure that you use only Dell approved adapter or
the adapter that comes with the product.
• Ensure that the USB Type-C cable is not damaged.
• Check if the maximum power consumption of
device is over 65 W.
• Ensure that you use only Dell approved adapter or
the adapter that comes with the product.
• Ensure that the USB Type-C cable is not damaged.
• 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
key for 8 sec to change the monitor setting from
DP 1.4 to DP 1.1a.