@mark

Sorry, I reread the question and my answer is probably a bum steer!

@mark

Strange to be helping you...!!

Would the OS you are working on be a thing? These units are only supported as far as Catalina. 

Not sure if I am insulting you with this reply.

Hope that helps. 

Eamkn

So I'm setting up a theater piece with 2 x TH2Go (display port edition).

Real HDMI cables to these 3840 x 1920 displays work fine, even quite long (20m) runs.

But, because we have some even longer runs, we also need to use some Blackmagic HDMI / SDI Microcoverters. Problem is, the TH2Go refuses to recognize the BM Microcoverters – the white "I've got a signal" light near the HDMI input never turns on. Any ideas?

Thanks in advance for the quick help!
Mark