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WV863100 Main DM circuit board for NP31 keyboard
WV863100 Main DM circuit board for NP31 keyboard
WV863100 Main DM circuit board for NP31 keyboard

WV863100 Main DM circuit board for NP31 keyboard

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WV863100 Main DM circuit board for NP31 keyboard

 

If your keyboard does not start and the LED does not light at all then providing the power supply is correct (voltage and polarity) the fault probably lies on the DM board and Yamaha recommend that this should be replaced.-

See attached flowchart from the service manual.

 

 Board marked : YD096  #3243

Yamaha DM Board NP31

 

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