I have an Onkyo 5508 prepro and it started changing modes repeatedly about six months after I bought it. The problem was around a ten dollar fix but I had to send it to Vancouver and was covered by warranty.It has been a couple of years now and many,many parties(cranked up)and works like a dream.
It wasn't the board itself but the cheap ribbon cable that they used, I think since then they wised up because there were alot of units being fixed under warranty.
I would personally get the Integra fixed if it was me.
