I did feel insulted by your response, Ian. That was a gratuitous and condescending remark.
I feel like Ian's voice addressing this matter is the voice of a propagandist.
I did get two faulty keyboards. One literally ruined one of my gigs that I barely got through by the skin of my teeth, so I do have the right to say, "What the f@#@?"
I would recommend the PSR-S900 to anyone, but if a good friend of mine was buying one, I would feel obliged to warn him to be vigilant of the quality control issues. I have heard of at least three faulty keyboards on the PK Owner forum. I don't read the forums in the other languages. This is unprecedented.
I think the fact that there is an over two month space between these defective keyboards and that they were sold as soon as they got to the store indicates very obviously that they came from different shipments. It is clear to me, at least, that I did "crack the case."
I am sure that Yamaha and Ian would rather folks think the problem came from a forklift driver. I don't think that I should be attacked as an irrelevant armchair detective just for pointing out that this is clearly not the case.
I have a right to be concerned about Yamaha quality control. I shelled out close to 1 1/2 grand for these two keyboards. I love performing on them. My audience is raving about my performances. Nevertheless, I shouldn't have to be worried that my kb just might fry out on an important gig - and that the warranty on labor is only 90 days.
Yamaha took great care of me. That I have stated, but I wish they took care of me on the assembly line in Indonesia in the first place.
Beakybird