Like Anthony I too still mourn the Technics keyboards. It was such a shock when they announced "no more" and in my opinion there is still nothing (repeat nothing) to beat it. I also have the Yamaha Tyros 3 which despite all the 'hype' isn't a patch on the KN7. I will say it has an excellent sound system but 'User Friendly' - forget it!

Dnj - I also had a 'duff' KN6000. I was given to understand that the first batch of the KN6000's distributed from the Factory were released with a fault, so it would seem you and I were among the unlucky ones.
However, I have to say mine was quickly replaced with a KN6500 from Technics and I had many happy, trouble-free hours playing it.

Audrey