Advertisements For the past few weeks, every time I watch my series 3 for couple of hours or more, the picture starts pixelating. It doesn't happen when I first turn it on. It will get worse and worse until it loses the signal completely and I get the searching for signal message. I can change to the other tuner and it is usually better. I can stay on the other tuner for a while, then it starts pixelating, too. Then I can go back to the other tuner and it is now ok. Back and forth. The picture is beautiful when it is up. Then both tuners will be fine for a while. Comcast sent some kind of signal to the modem but it is still happening. I had Comcast out here last week and the signal to the TV was fine. He changed the connector outside. But it is doing it again today. Today is the first time I have watched it a lot since Comcast came out. I have rerun the guided set up and that didn't fix it either. The Tivo has not been hacked and does have the extended hard drive. The 500gb made for the Tivo.