Zuki, having had this happen to me in the past...... your key contact went bad, happens alot on Yamaha's.... the 3k is different and usues a small contact strip instead of having to replace the entire contact strip like on a Psr9k & others etc....I had this done and it cost around $60-100.00 ... you'll have to order the part & it is possible to do it yourself if so inclined ...Otherwise a Yamaha service center can do it easily & hopefully in a timely manner. After that being its a single contact vs a key strip for all the keys just keep your fingers crossed other keys dont have the same problem.

Good Luck

PS: at least you have the Roland E600 to gig with as backup.

[This message has been edited by Dnj (edited 09-10-2007).]