Plugable UD-3900PDZ Troubleshooting Manual

This troubleshooting guide is intended to provide some initial steps and guidance for common or
frequently reported issues. For additional assistance with unexpected behavior with your device,
Plugable's friendly yet expert Seattle-based
support@plugable.com.
Troubleshooting
There is no video on the
monitor(s) attached to the
dock
The video on the attached
monitor is not displaying in
extended mode (or mirror
mode)
The video on the attached
monitor is flickering or
distorted
Troubleshooting Guide
USB Docking Stations
Suggestion Solutions
Ensure that the software used by the device is installed and
working in a good state:
● Windows
● macOS
Confirm that you are using the original USB cable that came
with the device (if applicable)
Ensure that the monitor is set to the correct video input signal,
as not all monitors will automatically toggle to the active input
Plug the device into a different USB port (if possible)
Switch the current display mode by pressing the "Windows Key
+P" combination and select your desired mode
Replace the video cable in use with a known-good spare to see
if the video cable may be faulty
Ensure that the computer has the latest graphics driver updates
installed. Check your computer manufacturers website or
contact Plugable support
graphics driver update for your system
support team is here to help – contact us at
○ Drivers available on the
○ macOS 13 installation instructions for the
DisplayLink Manager App available on the
Plugable knowledge
○ macOS 11 & 12 installation instructions for the
DisplayLink Manager App available on the
Plugable knowledge
for assistance locating the right
Plugable drivers
base.
base.
page.