Hi Squeak: Long time no see... here at the General Arranger Forum. Sorry to hear about the "bug" in the Casio. In reality, it may be just that! If it has been in "storage"... even though covered, those pesky insects can invade almost anything and screw up a contact or connection. If you follow Lee's advice... once you have "the lid off" (after first unplugging power) look around for insects before you do anything else.

Best wishes for success, Pal. ----Dave