No video with ud-3900

Hi I just installed the ud-3900 with lastest drivers on Windows 10.
USB mouse and keyboard, ethernet and speakers through phono jack works perfectly but both of my monitors do not work.
I have a HDMI and VGA monitor. They stay blank. No signal.

Thanks for posting! I am sorry to hear that our dock is not working with your monitors and I will be happy to help!

Based off of your description, the quickest variable to check is to make sure that the input settings on your monitors are set to the appropriate input that is being used. Would you be able to double-check that the input settings are set correctly by using the buttons on the front of your monitors?

Assuming the input settings are set correctly, we’ll want to examine some log files to see if they can tell us what is happening. To help us do so please download and run our diagnostic utility PlugDebug –> with everything connected. Please send us the file that is created on your desktop to our direct support email at with ‘Ticket Number 150068’ in the subject line so we can match everything up. We’ll examine the logs and determine next steps from there.

Thank you,

David W.
Plugable Technologies


USB mouse, USB keyboard, Ethernet, sound all work. HDMI and DVI/VGA monitors are dark.

Plugging HDMI directly into computer’s HDMI port(skipping the hub) works perfectly.

Sending log file to your support email.


Kristin has also contacted us directly at For both separate issues the DisplayLink cleaner steps below had helped resolve the behavior:

  1. Disconnect your USB video adapter or USB docking station (if using a docking station please also disconnect the power adapter)
  2. Uninstall the ‘DisplayLink Core’ software package via the Control Panel and then Programs and Features. This will also uninstall the ‘DisplayLink Graphics’ component if present
  3. Download and run the DisplayLink Installation Cleaner from here ->…
  4. Reboot the system, even if not prompted
  5. Download and install the DisplayLink 8.0 driver from here ->…
  6. Reconnect your docking station (after reconnecting the power) or USB video adapter and your displays should become active

David W.
Plugable Technologies

Yup, this set of steps worked. Both my displays are good to go!