mmmmmm

After years of faithful service I walked in to discover all channels on the TIVO were displaying "Antenna Problems - no signal"  Tried signal strength test, reseated all cables, and as a last resort reset the system.

big mistake evidently

Now the TIVO starts normally, shows the "just a few minutes more" screen, but when it gets to the intro movie, the screen starts dark, and gradually lightens, almost like a "etch o sketch" toy being shaken.

The sounds still work, and the TIVO still makes a "ding" when you press remote buttons, but screen still blank.

Weirdly, I stumbled on a previously recorded program and it played perfectly, just seems to be the UI.

Any clues, or could someone from Hybrid be trawling the threads, that may be able to help me?