Dell UltraSharp U2422H User Manual page 92

No video at HDMI
/DisplayPort
port
No video at USB-C
port (U2422HE
only)
No network
connection
(U2422HE only)
│
92 Troubleshooting
When connected to
some dongle/
docking device at
the port, there is no
video when
unplugging/plugging
the Thunderbolt
cable from the
notebook
When connected to
some dongle/
docking device at
the port, there is no
video when
unplugging/plugging
the Thunderbolt
cable from the
notebook
Network dropped or
intermittent
• Unplug the HDMI/DisplayPort cable
from dongle/docking device, then
plug the docking Thunderbolt cable
to the notebook. Plug the HDMI/
DisplayPort cable 7 seconds later.
• Unplug the USB-C cable from
dongle/docking device, then plug the
docking Thunderbolt cable to the
notebook. Plug the USB-C cable 7
seconds later.
• Check to ensure USB-C
Prioritization is set to High Data
Speed.
• Do not turn Off the display during
network connection.