Believe it or not, I tried to watch 4K via Hopper for the first time today, and WOW, has it been unpleasant. When I select UHD 4K program, the screen goes black for a few seconds, and then the Samsung 7000 series TV indicates there is no HDMI signal. Only way to get out of it, is to reset Hopper. Have tried three times, with same result. Is there a setting I've overlooked? Can't figure this one out.