How to reset a Casio ct-670 because it's acting strangely. It has a problem where you press a key and you press it again it won't do anything and you have to wait 1 second for it to make a note
Also, it holds each note for longer than it should.
Computers & Internet - Casio
Answers & Comments
That does not sound like something that will be solved by resetting it. It sounds like a bad contact. If you know how to use contact cleaner, try that. If not, contact a service center and have them provide the maintenance that it is in need of.