Hello

I recently got my first android TV. Its a Philips 4k ambilight... all that good stuff

I ran the channel finding thing and i found all my channels. But the 4k channels werent working.

So then i remembered i have a card thing that goes in the back. I tried using that and now all the channels have sound but no picture. All the OSD work correctly i can do whatever except see things. the screen is just black

Please help