This is for the CZ-101/1000 but will probably help you troubleshoot, nonetheless.Casio CZ-101 Key/Button Repair Guide - R-Massive Casio CZ-101 Key/Button Repair Guide - R-Massive This is a troubleshooting tutorial and repair guide for key and button issues for the antiquated yet venerable Casio CZ-101 (aka Cosmo, Cosmosynth, and CZ101). View on r-massive.cellarseer... Preview by Yahoo