Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

Intermittent Sound From Xfinity/Comcast Cable Box

Recently hooked up a Roku TV to my Xfinity/Comcast cable box, and the sound often goes out when I'm watching cable.  It can happen when I first turn the TV on or when I hit the mute button or even just changing channels.  No sound from cable.  The audio on all the Roku apps work fine, and I have to "reset" the cable sound by turning off the cable box, going to a Roku app where the sound is working, then going back to cable and turning the box back on.  This fixes the problem, but it's becoming a major headache.  Never had an issue with the cable sound prior to installing the Roku TV.  Any ideas?

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