They may have moved it to another transponder, so may now be on a different beam. It would help if you filled out some of the details in your profile, as then we would know immediately that you are in a fringe reception area.
Well, I cannot claim to fully understand what happened.
Piss'd-off with the lack of my channel list - I got my supposed dead Panny 30 from the cellar and hooked it up.
Did a forced d/load (now has EPG 1.2S4F AND it hasn't gone titsup for about an hour - even with some serious channel hopping.
There was a problem with my Favourites List (Searching for Listings message, then it jumped into the main Interactive menu).
Hooked up my replacement Panny again. After the card initialised - everything was back to normal (that's everything!). It works!
Card Hick-up? Dunno? At least my old Panny seems to operating again.
EDIT: The old Panny locked-up during GW Bush's State of the Union address. Uuumm: totally unpredictable, the lights are on - but nobody's home, locks out user intervention, useless without a remote control, uses a script to function.