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Reel Rookie

Cable TV input goes blank when other Roku channels are played

This is not a connection issue, but the only choice I seem to have is to refresh the cable box to "force' the Roku TV to recognize the signal. I managed to get a blank return twice from from the Roku TV input, because I was looking at Roku's choice of live streaming TV options. There should be a way to force refresh from the Roku side (better yet, never losing audio and video returns in the first place). It seems that if I'm watching cable, I shouldn't switch over to Roku content or I'm asking for trouble. In an ideal world I should have no problem doing both. It's a Sharp Roku TV. By it's very description one would think it would handle cable input as well as all the options Roku has to offer 

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