Did I tell you that one time I sent a Denon (lower end model) to the main Denon NJ factory site for warranty repair? They said they fixed it, and then when I plugged the AVR into the outlet, smoke came out of the AVR? I'm serious! Not joking!
A friend of mine had a similar experience - no smoke, but his Denon was never fixed, even though the MAIN DENON factory in NJ claimed that they had fixed it!
So I have exactly 0% faith when it comes to fixing these complex machines.
Analog amps and preamps seem to be easy enough to fix, but these AVRs and AVPs are just too difficult for these techs to fix unless it's something really simple like replacing HDMI boards or replacing an amp module. Maybe if they hired engineers to fix the AVR/AVP, that's a different story.
If anything happens to my $7500 AVP-A1HDCI or $5500 AVR-5308, they would be paperweight. Good thing I've owned them for about 10 YR now. So I guess anything beyond 10YR is a bonus.
I can't believe it's been that long!