I'm often surprised at how many problems you folk in the good ol' USofA seem to have with your kit. Don't know if it's so much bad luck, not reading the manual - and even if they do, geting it wrong in setting up, or what?
I am still using the fabulous M9750 power amp to drive the recently upgraded 4 Peerless 12" bass drivers in my tri amped, marble sided main speakers. I've had two wonderful A 9070 amps for over 30 years driving my super tweeters and extraordinary Onkyo plastic mid range horns which I bought in Singapore in 1974!!!! (and wouldn't trade them for all the BMWs in China!) and only recently replaced one of them with the remarkable A 9750 digital amp.
I've had my 905 since late 2007 with the 1.06 fw and it has been putting a smile on my face ever since without a hitch! For the last three years it has been in my house in Greece where the temp in summer can reach over 40c and, as the HDMI board gets ridiculously hot, I simply placed it on the top shelf with a 12cm fan on top - and it is enough make the amp feel cool even!
The only two issues I have had recently, after a nasty storm and power failure, are I can't save my set up (Store Fail msg), which makes the second one a real drag, as when there is a power cut (which happens a bit too often down in my village) and despite a power regulator, I lose my settings and they come back all random. A ball breaker, but I know all the settings off by heart so it only takes me a couple minutes to re-do.
Any advice/suggestions to correct these annoying issues would be greatly appreciated as, apart from that, I am still in love with the big Onk - and all my other lovely Onkyo kit.
"Take care to get what you like or you'll be forced to like what you get"! G B Shaw