Since yesterday I've been experiencing code S0a00 on two of my Xfinity DVR boxes(legacy), code isn't on every channel just a few HD channels. Had a Comcast tech(contracted tech) come today and he said all the lines and signals are good but replaced some connectors. I'm no longer seeing the code on the one box, but the channels that displayed the code are intermediately distorted with patches of green and sound cutting out, the other box was fine for a while than the code started appearing when changing channel, but would go away after a minuet of the channel being on, and now the code doesn't go away at all.