I've had a couple of Onkyo AV receivers before, I have no complaints with performance, but had issues with reliability on both. I had the same issue on both models, the power would come up but the system is basically dead - this happened on a 705 and on an earlier model before the 1-year warranty expired. Both unit were repaired free, but after more than a year the 705 had the same issue and I had to pay more than 1k for the repair.
After the second issue on the 705, I decided to sell it and went for another brand and got the Denon 1909. I find the SQ on the Denon 1909 much better compared to the 705, and it's really reliable - been using it for 4 years now without any issues.