Our Yamaha CVP-303 Clavinova powers on and plays the root instrument (Grand Piano) but all the buttons on the console do not operate. When it boots, the LCD panel boots correctly, but the other LEDs (aside from the power indicator) do not. There is no way to access the other voices or other features of the piano. I am guessing a board has gone out or there is a disconnected wire somewhere but I could not see any obvious culprits when I opened it up and looked inside.
Any ideas??
Thanks!
Tim