For about a year now, my 705 would make loud popping noises (and powerful booming blasts from the subwoofer) every time I turn the machine on. It does it so loud that I have to turn the volume almost completely down to contain it. After a minute, it goes away and the proper soundtrack remains. Since then, I have been accustomed to leaving the receiver on. The other day I'm sitting down -- dvd player off, receiver on -- and an enormous pop/gunshot-noise comes from the right speaker. Since this happened, the only noise i can get is popping noises when discs are playing. The closest I got to fixing it was the proper soundtrack coming out from just the surround channels. This issue happens even when running iPod via component audio.
I'm thinking this receiver has had its day, as it runs very hot, and the popping sounds have been too prevalent. The subwoofer booming has been enough, as it is unbelievably powerful and signs of a large malfunction. This could also ruin my speakers. With the 705 I've tried only a few things -- which mostly include unplugging it for a day. Research shows that hard-resets haven't worked for others. I'm very close to moving over to Denon and getting a bit of an upgrade. The fact that the Onkyo runs so hot cannot be a symptom of healthy electronics.
At any rate, if there is a fix to this which you all have used, I would be interested in salvaging this. But if I'm at the end then I'm happy to upgrade as well to something that might suit me even better.
Update later today: After 2 days of this, I had finally just left the receiver on since yesterday. It is now able to play soundtracks again i.e. it is able to work now. I still am taking this as a strong warning with this machine. Being that I'm leery of turning it off again -- and possibly not being able to use my entertainment system for indefinite time-periods -- I'm still looking elsewhere at a more reliable machine, and one that has some of the features I'm now desiring. At least the Onkyo 705 still has life in it, and I'm at least able to enjoy movies/music again for the time being. I'm also wondering if there is something I can do to prevent this from happening again, as it affects my speakers, and I can't just leave the machine on all the time.
Edited by Napoleon D - 1/9/14 at 12:34pm