I was watching a football game on ESPN last week, when all of a sudden the screen blanked with a V52 error. I've spent the last 5 days rebooting, powering off, getting refresh signals sent from the cable company, to no avail. Right now, about 1/3 of my channels have a V52 error message, or are completely pixelated and unwatchable. The other 2/3 are completely fine. WHICH channels are experiencing problems seems to change from day to day. It isn't specific to SD/HD, Premium/Basic channels. I went though a useless troubleshooting exercise with Tivo, which pointed the finger back to the cable company. I called the cable company and wasted more time with someone that didn't know what a cable card was, much less a Tivo. The call ended with them scheduling a service call. My Tivo is about 4 1/2 years old, so I'm wondering if there is something that can suddenly fail that would cause these symptoms? Or perhaps the cable card itself?