The last week or so I've been having partial recordings on my HDTivo. There is nothing else being recorded to make it stop.

I'm recording over the air (I don't have cable) and often programs go about 40 minutes into an hour before stopping. I also have a tivo extender plugged in.

I've been playing around tonight, and I notice that it often seems as I switch channels I get a black screen like the tuner can't find the channel. Switching up and down usually gets the channel to show up right.

Navigating to Now Playing seems to sometimes freeze for a bit before it displays.

Signal strength is pretty strong consistently.

Could this be a tuner going bad? Or a drive?

I started recording Jay Leno tonight at 11:35pm and it went about 15 minutes in and then seemed to stop. It still showed as recording, but if I went to play it it didn't go past 11:50pm. Going live on that tuner gave me an empty screen. Stopping recording, then going up and down a channel brought back the program.

I just got the $99 deal on lifetime service too. Figures it starts dying now.