I had similar problems. Take a look at my postings over the last month or so. The main problem with me seems to have been low signal strength combined with bad cable cards. Since I've had my home re-cabled (new cable run to my house plus new cable run into my home), and then had both CC's replaced, my S3 works most of the time. About once every week or three I loose all but the OTA channels on CC#2 - a cold boot with power off for several minutes fixes this for at least a week or so. I'm starting to wonder if I need to ask Tivo to send me a new S3, but hate to have to go through entering all my wishlist, season pass, etc. info.