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Hey everyone, I'm new to this forum but also new to Casio Keyboards! I have bought a WK-3700 but shortly after playing it for the first time some of the keys became "Stuck" the actual keys don't physically get stuck down but once pressed they don't play again and on the display they're shown as still being pressed? If you change piano type they reset but the same happens again. This must be a setting issue? Things I've done to try and fix it: Reset the System (no luck) Reset Parameters (No luck) Played with every setting in the manual (Still no luck) ... I should point out that the other keys are set to pressure setting 3 so the volume is according to the amount of pressure applied but the four troublesome keys are not pressure sensitive. I know I'm new and this is my first post but can any of you lot help me with this problem please? The really annoying thing is the keys they are playing up are the ones I need! Thanks in advance -Rusty.