Korg Forums

My 'Value Up' push button stopped working; works
going down though; Any clues as to a remedy?

you either have a non-responsive dirty / dusty OR sticky OR worn out OR broken tactile switch
tactile switch are neither expensive nor difficult to find -- it's taking the wholeboard apart that's the trouble

but. if you're up to the challenge, then checkout this link... in it you'll find what you looking for.

http://www.bustedgear.com/repair_Korg_t ... ttons.html

also in [global mode] you can assign a foot pedal to function as increment "VALUE UP".