Ditto for me, unfortunately. I'm on my second brand new Onkyo 875 this month. Bought the first brand new 875, September 2008 & it just didn't work from day one, no sound at all. Spent 2 wasted evenings checking & double checking all speaker connections etc. Got that one replaced with another supposedly brand new 875 just last week, (although the box it arrived in from Onkyo looked well used & every single piece of polystyrene packaging was smashed).
I was in the middle of a Monty Python movie on this replacement 875, at low volume, (we have 3 very young children sleeping in the house), I was aware of some funny clicking or switching noises coming from the 875, when suddenly there was a pop, the screen went blank I turned to the 875 to see a red light flashing, followed by a small flame & smoke coming out of the top left handside of the ventilated area. All quite frightening & in hindsight very alarming regarding the fire risk to my house & family.
I have always taken excellent, if not intensive care of my 875, I was well aware it could run quite warm, so it was well ventilated i.e. it was freestanding on my wooden floor, in my dining room, with nothing on top of it. I even opened a window to help it "breathe". It has always been run at low volume levels.
This model should be subject to an immediate safety recall in my opinion.
I am considering what the next course of action should be. I do not want another 875. Perhaps the 876 has been more vigorously safety tested. Perhaps I'll just ask for a full refund & switch to another brand, as my confidence in Onkyo has been so badly affected.