I have the sr-805, and BIG problem with the crack/pop.
I read at least 1,000 pages all over the forum, and decided that firmware update is the only way to get it solved.
However, after trying 2 different downloads, 3 different DVD players (all through Opt 1 of course), and 3 different CD-Burner with all suggested ways (imgburn, iTune, Nero, Roxi, etc), still got no luck.
I can see the "S/PDIF updating..." screen on the receiver, but no matter which disk I play or on which DVD player, I just couldn't get to the next step of "writing....".
Any suggestions? Really appreciate it.
(PS: tried to contact Onkyo, but they never get back to me).