Tivo No Picture until Reboot

I turned the Tivo Premiere XL4 on this morning. The Tivo graphics were all there and working, I could change channels, etc. But there was no signal on any channel, just a black screen. I rebooted and everything was working as normal. Though the 2 most recent recordings were black screens as well. This has happened once before, moths ago. Anyone else ever had this? Software issue or cable card or something else? Thanks.

Whoops wrong forum, I'll repost in the Premiere forum.