And it was going so well.
15.2 update installed, no spontaneous reboots, all apps working, all my recorded shows/series links in good stead.
Until today.
Now my 500GB TiVo is stuck in a loop, where a green "your DVR is being repaired" screen displays for a few seconds before it tries to start up again. And again. But never does.
Guess I'll be needing a new one. Time to book an engineer!