Effects stopped working - Yamaha Clavinova CVP-75

by Jay Rubin
(Florida)

We have a Clavinova CVP-75, opened it up and cleaned three sticking keys. Only the connectors for the keys were disconnected temporarily. But now none of the effects are working. Is there a short-circuit or other problem that may be repaired? This is a fantastic old instrument and want it to play as it should.