Had the same issue at home, plugged in , U99, but got it to work. Recorded like a champ. Finalized with no issues. Over the last month, probably recorded 25+ movies. Only issue I had was if there was a power outtage then the U99 message showed up.
Last week, the U99 message started to pop up more and more. Unplug, and it would go away. Then, it would show up even while unit was on. Then last night, I had a hell of a time getting the unit to take the disc. Just would say reading. Finally got it to record. Then, every time I tried to finalize the disc, it would say the usual will finalize in 15 minutes(usually done in 4) and then I got a screen (the screen showing all the shows you have on a disc, before finalizing starts) and nothing happened. And the machine was frozen. Had to unplug. Tried 2-3 more times, froze up every time. Had a tough time getting the disc out. Finally popped it out put in my other Panny (ES46V) and no issue finalizing the disc, looked great.
Trying to turn the unit on today, it gets stuck on Hello, and freezes up again. Have to unplug. No other error codes....so any thoughts, suggestions?