I have a RU8000 and am experiencing an intermittent issue. Every once and a while, when swapping between external device sources (HDMI channels) the screen appears blank. I still get sound. I still get the TV menu, and still get the external devices (virgin media tivo) menu on screen. I can fix it by unplugging the hdmi cable, and plugging it back in. Strangely I experience another problem. I use a Nvidia Shield TV. Everything appears to work ok but occasionally when trying to play a video on the Amazon Prime app, it throws an error with a message that I'm not using an HDMI cable. Once again unplugging the cable and reattaching fixes the problem. I've already ran the HDMI self diagnosis feature of the TV but it does not find a problem. Any ideas?
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