I'm having a problem with a few of my Comcast digital cable HD channels. Sometimes I lose audio, sometimes I get freezing and/or pixelation, and sometimes the channel goes completely out with an error that says something like "this channel is currently unavailable."
This is only happening on 3 or 4 channels that I'm aware of. Often, switching channels away from and back to the channel in question clears up the pixelation and audio. Other channels are crystal clear without any audio or video problems.
I unplugged my box, and it cleared it up for a while but it came back. I also replaced the box a few months ago when this happened. It kept happening with the new box, and then cleared up on it's own a few days later before the cable company had a chance to send someone out.
My question is, how can a cabling issue affect some channels but not others? To me, the 1s and 0s either work over the cabling or they don't. Why would some channels be fine, but others not work?