My NR1007 is dead also, and most likely out of warranty since I purchased it in early 2010. Great, now I have a $1800 paper weight.
It happened the first time two days ago, no sound at power up. It came back after on/off ..next couple of times I had to power cycle. As of right now it's totally dead, have been trying to get sound for passed 30 minutes with no luck.
Good thing I opted for the higher end model, you know ..get quality that will last more than two and a half years with light usage.
So disappointed right now. Looks like everyone is having this problem, seems like these units from Onkyo are total lemons.