I know there are a number of threads about the STA1520, but this seems to be a new problem. I have a Tivo HD model that I purchased from a friend. When I had basic analog cable, it worked just fine. I recently subscribed to Time Warner HD Cable and they installed both an M Card and a Cisco STA1520 tuning adapter. The system seems to work fine, I can tune all the channels, record, etc... The problem is that within 12 hours of booting, the Tivo freezes COMPLETELY. The status lights on the front stay as whatever they were when the Tivo froze. The remote does not cause the orange light to light up. On screen, the image of live TV is frozen. Using my iPhone with the TiVo app cannot find the Tivo. The Tivo will stay like this indefinitely until I unplug it and reboot. I'm new to the Tivo community, can anyone give me any tips as to what I should do? Having the Tivo freeze every 12 hours or so isn't acceptable, as it won't record anything after it freezes so I am missing many shows.