Dell P3421W - Universal Serial Bus (USB) Specific Problems

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Universal Serial Bus (USB) specific problems
No video at HDMI/
DisplayPort/USB
Type-C port
When connected to
some dongle/
docking device at
the port, there is no
video when
unplugging/plugging
the cable from the
notebook
• Unplug the HDMI/DisplayPort/USB
Type-C cable from dongle/docking
device, then plug the docking HDMI/
DisplayPort/USB Type-C cable to the
notebook.
Common
symptoms
What you
experience
Possible solutions
USB interface is
not working
USB peripherals
are not working
• Check that your monitor is turned On.
• Reconnect the upstream cable to your
computer.
• Reconnect the USB peripherals
(downstream connector).
• Switch Off and then turn On the
monitor again.
• Reboot the computer.
• Some USB devices like external
portable HDD require higher electric
current; connect the device directly to
the computer system.
USB Type-C port
does not supply
power
USB peripherals
can not be charged
• Check that the connected device is
compliant with the USB-C
specification. The USB Type-C port
supports USB 3.2 Gen1 and an output
of 65
W.
• Check that you use the USB Type-C
cable shipped with your monitor.