The reason I asked you about channel dropout was because I have had a similar problem, but only after the v3 upgrade. I did not get v3 until 2 months ago and had no problems before then. In my system one channel (l,r front, or center or l,r rear) does not come on when coming out of standby. I thought it was unique to my system and it has only happened 3 times. As you report, each time powering off from the rear solves the problem.
Has this been discussed by others on this forum? If so, I somehow missed it.

AJR