User Manual

Troubleshooting | 109
Problem What you
experience
Possible solutions
No image
when using DP
connection to
the PC
Blank screen • Verify which DP standard (C2422HE/
C3422WE:DP 1.1a or DP 1.2)(C2722DE:DP 1.1a
or DP 1.4) is your Graphics Card certied to.
Download and install the latest graphics card
driver.
• Some DP 1.1a graphics card cannot support DP
1.2(C2422HE/C3422WE),DP1.4(C2722DE)
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 1.2 to DP 1.1a, DP 1.4 to DP 1.1a
No image
when using
USB Type-C
connection
to computer,
laptop, and so
on
Blank screen • Verify if the USB Type-C interface of the device
can support DP alternate mode.
• Verify if the device required more than 90 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.
No charging
when using
USB Type-C
connection
to computer,
laptop, and so
on
No charging • Verify if the device can support one of 5 V/9
V/15 V/20 V charging proles.
• Verify if the Notebook requires a >90 W power
adaptor.
• If the Notebook requires a >90 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.