Hello, our series 3 has periodically green screened (no text, just bright green and loud screeching) and rebooted just about since we got it in mid-2008. Based on most of our searches, it seemed like replacing the hard drive was the way to go. We purchased a 1TB drive from WK last December or thereabouts. The problems seemed to slow down somewhat, but in the last few months have, become just as bad as ever.

After calling tivo with my suspicion that it might be a cable card problem, they checked several settings and numbers within the DVD diagnostics and cable card menus before declaring that the cards appear to be operating just fine The tech told me to remove the hdmi cable and also the network cable. I did this a week ago, and hadn't noticed any trouble until tonight, when it "black screened"- same as green screen, but black and loud screeching. It did this during a recorded show. So, after rebooting, I went back to the show and watched it from beginning to end with no repeat of the problem. I guess this means that show was likely not the culprit.

About an hour later, while watching live tv, it just rebooted out of nowhere. I took the opportunity to run a kickstart 54 automated overnight test. I'm not sure if it will show me any results in the morning, or what. But right now all that's connected to TiVo are power and component cables. So it can't be wireless or wired networking, or an hdmi issue.

I sure could use some advice on what else to do to get this diagnosed and fixed. Thanks a lot for anyone patient enough to have made it through this.