Yamaha PF15 silent key

[Yamaha] [PF15]– [key not working]

Yamaha PF15 Silent key.

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Hello. I have an old PF15. Love the sound but one key is not working. Moves fine, like the others,.but no sound. I would like to repair it myself, but I have no idea where to start. Any suggestions for a possible reason, and what to do? Thanks in advance, Harmen, The Netherlands.

The Service Manual can be found here:

Probably just the keyboard contact that needs a clean with a cotton bud and some alcohol.

Good luck!