I am having similar problem. Just bought 65 inch 4k Samsung TV (Model #UN65RU7100F) two days ago and hooked up to DirectTV Genie Mini. When I firts turn the TV / DirecTV on everything looks good, then the screen goes black and I see a spinning circle for a second or two and the picture & audio reappears. Then 4-6 seconds later the same thing happens again. And then 4-6 seconds later the same thing happens again and again and again. This continues until I turn off the TV and the DirectTV input and restart both. After the restart everything works fine and the screen does not go black. But any time the TV is off for a couple of hours and I turn it on I have to go through this same process all over again. (Start the TV / DirectTV, wait for screen to go black, then turn both devices on/off). I checked to see if TV software needed updating and it's fine. I changed HDMI input I was using on the TV and that did not help. I switched out to a new HDMI cable and that did not help. ANY IDEAS FROM SAMSUNG SUPPPORT BEFORE I RETURN THE TV TO BEST BUY?
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