Bi Directional SDI - HDMI Convertor Question

I have several SDI Sources that I want to connect to an ATEM Mini switcher. I previously used a Micro convertor SDI to HDMI to get from the camera to the switcher but after a failure I have now got a Bi-Directional SDI-HDMI Micro convertor but I cant get an output from it when going SDI to HDMI. It does give an output when going HDMI to SDI. Am I doing something wrong - do I need to set up which direction is the conversion?

Peter

NO .. It works automaticaly .. No settings needed ..

Sounds like the unit may have failed and need to be replaced.