Earlier today, our cable went out. The TiVo screen went black, but the clock (select-play-select-9-select) in the corner of the screen was operating properly. Hitting the TiVo button made the usual noise, but nothing happened or was displayed...still the black with clock. I could hit info and see the text about the current show that I was (not) seeing, but couldn't get into the normal TiVo menus.
This is a TiVo-brand TiVo, an 80-hour Series 2 unit circa Sept. 2003, with analog cable as its input.
I had to do a hard pull-the-plug reboot to get it going again. It's been a long time since its power has been interrupted this way because I keep it on a UPS that carries most power drops.
I did the reboot after the cable came back, but I assume that since TiVo was behaving again, I would have been able to access recorded programs even if the cable signal was still dead.
Is there some reason why the loss of signal would semi-crash the TiVo? It's not like we've never lost cable for an hour or four before. It was recording at the time, but of course it's always recording or buffering something.