Guys, encountered a problem yesterday with my 515.
I was watching Oblivion off a usb drive connected to my bluray player yesterday when I noticed that no sound was coming from the rear surround speakers. I quickly checked the details of the movie file and it says it has 5.1 channels DTS. Then I pressed the movie mode of the Onkyo but lo and behold! screen says not available??
I was puzzled why this is happening. I also noticed that the Audyssey light on the onkyo's screen is missing. I tested with other movie file, and even a bluray disk of DKR but still no sound from surrounds.
Then I turned on my apple TV and played music via AirPlay and I instantly heard the sound from the rears. This worried me even further.
I tried going into the Onkyo's setup but somehow the second option (speaker configuration) is grayed out and inaccesible. So I resorted to going online to find the answer but to no avail. I even unplugged and plugged back the two banana plugs of my rears connected to the Onkyo but still nothing changed.
I ended up resetting my AVR then going again through the painful process of setting it up ala just-opened-from-the-box. I ran the full Audyssey setup and have to withstand the loud spikes it produced while calibrating the speakers/room with the provided mic. (I hope my neighbor didn't complain as it was already 11:30PM)
I'm not running the latest FW (just the second to latest) as I don't see a reason to upgrade because the problems stated online needing FW upgrade isn't and haven't happend to mine so.
Anybody experienced this problem? It would be helpful if any member here could attest to my story.
In the meantime, i'm reading the 19+ pages of thread of Onkyo problems in AVS forum to be better informed if such incident will happen again.