Hi all, I have the same issue with Optoma Cinemax Pro and Denon AVC-X3700H. Cant get it to work with changing cables or trying to use monitor 2. Only workaround for me at the moment is to simply plug everything (I only need 3 hdmi inputs) directly into the projector and use optical back put to the Denon. I know it's not ideal but guess I'll have to live with this until it's fixed.
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