Dell U2723QE Service Manual page 20

Problem What you
experience
No image when Black screen
using USB-C
connection
to computer,
laptop, and so
on
No charging No charging
when using
USB-C
connection
to computer,
laptop, and so
on
Intermittent Intermittent
charging when charging
using USB-C
connection to
computer,
laptop, and so
on
No image when Black screen or
using USB-C 2 nd DUT is not
MST Prime mode
No network Network
connection dropped or
Intermittent
6. Trouble Shooting Instructions
Possible solutions
• 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.
• Verify if the device can support one of 5 V/9 V/
15 V/20 V charging profiles.
• 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-C
connection.
• Ensure that you use only Dell approved adapter
or the adapter that comes with the product.
• Ensure that the USB-C cable is not damaged.
• Check if the maximum power consumption of
device is over 90 W.
• Ensure that you use only Dell approved adapter
or the adapter that comes with the product.
• Ensure that the USB-C cable is not damaged.
• USB-C input, Go to OSD menu, under Display
Info check the Link Rate is HBR2 or HBR3, if
Link Rate is HBR2, suggest to use USB-C to DP
cable to turn on MST.
• Do not toggle Off/On the power button when
network is connected, keeps the power button
On.