Hi!
We were given a YAMAHA Clavinova CLP-500 and some of the keys do not work. Some are stuck in the down position (if you manually lift, they fall all the way back down quickly). And others are halfway down (if you manually lift, they will stay up, but after pressing down, they go back down). My question is, given the positions are different on the unusable keys, how do I know if I just need replacement keys or if I need something else like a spring or hammer?
Thanks in advance!