Plugable UD-3900PDZ USB-C Docking Station No longer can power up

I have a Plugable UD-3900PDZ USB-C Docking Station, bought in July 2021. For some reason it no longer can be powered up. I confirmed that I don’t have power source problem.

Hi Evon,

Thank you for contacting us, I am sorry this is not working as expected and I am happy to help!

Based on your description I would like to start by resetting the docking station and computer to see if this helps to restore the functionality, please perform the following:

  1. Disconnect the docking station from the computer and remove the power connection from the back of the docking station, unplug all USB devices from the docking station
  2. Disconnect the docking station’s power supply from the wall and let both the docking station and power supply sit for 30-90 seconds to fully discharge
  3. Restart the computer
  4. In Windows 10: Start > ( Power Icon ) > Restart
  5. In macOS: Apple Menu > Restart
  6. After 30-90 seconds, reconnect the power supply to the wall socket or power strip
  7. Reconnect the power supply to the docking station
  8. Verify the blue power LED is illuminated on the front of the docking station, please let me know if this does not come on when connected
  9. Reconnect the docking station to the computer
  10. Please be sure to use the original USB cable provided with the docking station
  11. Connect the cable directly from the docking station to the computer, adapters, hubs, or cable extensions may reduce the docking station’s capabilities or prevent detection
  12. Check for the external displays to be detected on the system, if they are not detected please let me know
  13. Reconnect USB devices to the docking station one at a time, test each device to make sure it is working before connecting the next device.

Please let me know if this helps, if not we can start the warranty replacement process:

To ensure your privacy, I recommend moving to direct email support for the warranty replacement process. Please send an email to ‘’ with the subject line “Ticket #364560 - Attention Pat”. In the email body, please let me know the Amazon Order ID ( available from ) for the original purchase of the UD-3900PDZ ( in the form of “###-######-#######” ). Additionally, please let me know the serial number from the bottom of the docking station in the form of “####A#####” just below the “FCC” and “CE” marks on the label. Finally please include your preferred shipping address for receiving the replacement UD-3900PDZ, for addresses outside of the United States please include a phone number we can provide the shipper in case they need to contact you to arrange delivery.

Thank you, and I apologize for the inconvenience this has caused.

Plugable Technology


This issue was resolved via direct email by sending a replacement docking station with power supply to ensure both components were working correctly.

We’re closing this thread, but if you have any further questions please feel free to contact and we’ll be happy to help.


Plugable Technologies