The TX-SR606 was launched in June 2008 and was replaced in April 2009 so I am not sure how it is under 3 years old. That said it is disappointing when any electrical items fail in a relatively short period. My Denon first Denon Receiver lasted 3 months beyond its warranty before it went bang. My TX-NR807 was repaired twice under warranty. Denon treated my like dirt and basically told me tough and that is why I will never buy from them again, the Onkyo was also fairly unreliable but I feeel that I have been well treated by both Onkyo and GenServe.
It is all down to personal experience.
Who said it was under 3 years old....you just made that up...
Trouble is Onkyo don't recognise the excessive heat problem with the 606 which is the main cause of the board failure......mine has had 3 new boards now in just over 4 years....all repaired under warranty by Genserve.
I have never had any problem getting it fixed (5 year RS warranty) but it is unreliable, and the heat it kicks out is ridiculous...you will literally burn your hand on it if you touch the rear corner of the unit. Onkyo say this is within specification and what annoys me is that the HDMI daughter board gets replaced, and then a year or so later it needs replacing again....and then again. It has recently started acting up again...not onscreen menus, blue screen, HDMI handshake issues, so no doubt it will have to go back in sooner rather than later to have it done again. (which reminds me I better sort that out before the warranty expires). I can accept things go wrong from time to time, but not the same thing time after time.
As for Pioneer or Yamaha being more reliable, I'd like to see the proof of this - or is it your own experience? I could point you in the direction of a major AV/HA installer in Stoke, who used to be a Yamaha main dealer and now wont touch them due to the high failure rate and difficulty getting Yamaha to undertake warranty repairs, he mainly installs Onkyo now. His choice based on his experience.
I have never had a Yamaha or pioneer go wrong on me, however I have yet to have an Onkyo product that has lasted more than a year beyond its warranty. (two receivers, a DVD player and a stereo amp all had issues of one sort)
I could also point you to our local installer (Salisbury, Southampton, Weymouth and Portsmouth) who used to be an Onkyo main dealer and now won't touch them because out of all the 606s he sold, only two were never returned for repair....the same problems as mine had/has and the heat issues.
But it is my personal experience that informs my decision making rather than anything else.....
There are plenty of very happy Onkyo owners out there, whose amps and receivers last just as long as any of the other major brands.
No doubt, but not in my experience and I will never buy from them again, I would rather pay more for peace of mind (and better build quality) even if the service of Genserve is beyond reproach.