Like I wrote, I had a similar problem with popping and then no audio for an extended period of time. I found the solution on another site,
http://dexsoft.com/blog/?p=15
Apparently the solder joints are weak, and just as the blog described when I opened up the receiver I saw the same scorch marks from overheating. Just as the blog described, I added solder to each of the joints in the photo and have had no problem ever since.
I am no solder expert, this is my 2nd time, but all I did is build up each of the joints and I have been listening to music, playing movies in surround sound with no problems, no popping for the last 2 weeks.
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