HT-RC360 owned 1 week. has shutdown twice. Is it getting to hot or being pushed?
Capezio49er, I had the same problem as you. Actually this is the 2nd unit that had this problem.
The first one I had to exchange.
I was watching a Netflix movie via my LG tv (via built in ethernet), sound piped to rcvr via toslink. At one point in the movie, someone screamed loudly, then my receiver volume cutoff completely. I turned it off/on etc. got sound back, turned vol knob up...when it got to around 60's, I heard a pop and it powered off! I repeated this again, then got their "check sp wire" message. I did pull the cord like they say in the manual and leave it for an hour. I did not yank all wires from rcvr, but disconnected at speaker ends (still a pain!) Steps say then plug in, turn vol up max, then to min, plug in. It worked so far, but this is ridiculous. I should have bought a Yamaha! On top of that, no repair center in my state (in fact I dunno if in ANY state other than CA), I'd have to ship it to CA at my own expense (can you imagine how much since this thing weighs a helluva lot?)
I don't believe the heating thing is the problem. Mine also is in a TV stand shelf, but has about 4" of top space. Besides, all these Onkyos run hot these days, just chk all online forums. Even Onkyo told me that and not to worry about it. What's lame is they have no built in A/C spare outlet. I bought a fan to mount on top but have nowhere to plug in. IF you plug into a surge strip you'd have to turn the strip off every time. Found someone selling a heat sensor that turns on a fan, but the product had quite a few quality complaints. Tried about 3 surge strips that power off when a master outlet on them do, but the Onkyo draws too much power when off these didn't work.
Just for the heck of it, I will try the impedance check Fotomane mentions, but I'm pretty sure my speaker wires are of sufficient gauge, and my speakers are within the 6-16 ohm impedance that the Onkyo manual states.