The first is that the sound breaks up intermittently on a few of the HD channels so bad that my wife had to switch over to the analog channel to watch survivor last night. Is this common, or could it be a problem with my cable line to that set?
i'm in atl as well. i'm not sure if it's a common problem but mine does the same thing. some DT programs seem to do this but luckily i haven't seen this problem on HD programs yet.
The second is that the video on the INHD1 channel on the same set will also break up some times into a crazy looking vertical stripe pattern. It does not seem to do it on that same channel on my other set and does not do it on any of the other HD channels on that set. Any thoughts? Finally, since I hooked the cable up, I am getting a very faint line that rolls up the screen when I watch DVD's. If I unhook the cable from the back of the HD box, it goes away. I am guessing this is some sort of ground loop, but I was not sure what to do about it other than unhook the cable every time I watch a DVD.
hmm, i don't know. perhaps you might have a bad STB or cables. i do see picture break up's every once a while but i don't see the vertical stripe you mentioned. of course, my setting is different from yours so it's not a good comparison. i route my stb through a receiver then to TV.
comcast hd signal is very sensitive, at least at my place. i had to make sure every connection was securely fastened. i also had to trace my cable and straightened most of the place. this helped a lot. but i still get occasional drop outs. i hate them but i'm also getting used to them.
since you recently got it installed, you should be able to ask comcast to come out and check your wiring/equipments again. if the signal is too low/noisy, they may install an amp/filter for you. good luck