Ha Ha Ha! It’s great to be right now and again!
I have received this very nice old P2 (made in 2003) and the fault was exactly as I thought…. the capacitors in the output stage had been destroyed…. most likely by over-voltage, and the most likely cause of that is someone plugging the output into a mic input with phantom power on it!
So Neil, it’s all fixed…. don’t do it again!