T1 Plus Black Screen

I have tried for a few days to figure why when I use FTMC (Jarvis 16.2.29) I can't play 4K video streams correctly. Everything up to 1080 Full HD plays well but, when I play 4K I do get the audio, but this is no video, just a black screen.

I tried going to System>Video> Acceleration and changing the settings there (as I saw suggested), but still a no go. When I go to System Info I notice that it says "Screen resolution: 1280x760@60Hz- Full screen". I have a late model Sony Ultra-HD 4K TV, that plays 4K well through my regular TV service provider. Also, using the T1's WiFi, says I am connected @ 150mbps.

I am thinking this is may be my issue somehow not high enough screen resolution to play 4K. Is there a way to adjust or fix the screen resolution, or other way to get 4K streams to play?

Thanks for any help or suggestions.

Anyone have any idea at all?

Thanks