Thank you for contacting Plugable! I’m sorry the UD-3900Z isn’t working as expected, and I’ll be happy to assist.
Based on your description of the behavior, our next step is to get some additional information.
Can you please send an email to our direct support email address (support@plugable.com) with “For ticket # 452939” in the subject line? In the email, please include the following information:
The Amazon/Walmart/Newegg/eBay order number for your docking station purchase. If it’s from Amazon you can find this at www.amazon.com/orders
While the docking station and displays are connected to your PC (even if not working as expected), the output of our diagnostic utility PlugDebug: https://plugable.com/pages/plugdebug
This information will help us to determine the next steps.
** Please do not post the above information here in our public forum (it contains personally identifiable information) **
Apologies for the frustration, and thank you for giving us the chance to help!