I composed and then deleted unsent a similar suggestion about the battery: my SY-99s exhibit a bunch of random troubles when the batteries are dead and you cannot do diagnostics or resets without functioning backup batteries. It sounds like you have already reseated connectors to the panels. Good luck From: Terje Winther terje.winther@... [vintagesynthrepair]
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RE: [vintagesynthrepair] Yamaha DX5 problems, please help
2016-08-07 by Paul
