I have two monitors attached to the HDMI ports using a new Dell XPS 13. Whichever monitor is connected to the upper HDMI port of the hub turns off and on randomly and continuously. I’m using the Plugable power supply and supplied thunderbolt cable.

Hello Mitch, Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you. Since both monitors are doing this on the same port HDMI port but not the other, it could indicate an issue with the dock itself. We may need to try replacing the dock unde…

Thank you. The two monitors are identical. I tried a third monitor (different brand) and got the same behavior.

Thanks for the info and trying another different screen. I’ll reach out to you directly via email to arrange a replacement unit under warranty. Best, Josh

Joshua, I received the replacement hub and it works perfectly. Thank you for your quick response! Mitch

You’re most welcome, glad to hear the replacement helped! Best, Josh

Plugable Support

One HDMI monitor randomly turns off and on

Thunderbolt TBT3-UDZ

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