Yesterday my new SAMSUNG QE 75QN700ATXXU 75" QLED 8K TV arrived as the previous model 4K screen failed after only three years
When i plug the fire Stick in to any HDMI port all i get is a black screen, the TV can see the Fire Stick however the menu or home screen will not load.
I have phoned Samsung who remotely accessed my TV and rebooted the HDMI Ports made no difference.
The device works fine on older TV's i even tried a new Fire Stick in the TV nothing will load.
Samsung told me to contact Amazon or to reach out in the forums, as the seem to think that the 4K Fire Stick may not work on a 8K Samsung TV