Yamaha Dgx-640 adjacent keys not playing

by Stephen
(Wakefield, UK)

When I hold down E, F won't play and vice versa. The same is happening with B and C. Does anyone know how to fix this? I've tried a factory reset by holding down the last white and 3 last black keys.

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Feb 27, 2020
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starstarstarstarstar 		DGX660 f key not sounding
by: Anonymous

Four year old yamaha dgx660 f key plays once then dead.
Took it to local yamaha repair agent but problem still persists.
Always kept this keyboard covered and is never moved.
Very disappointed with this yamahs keyboard which is touted as their best.
Jan 28, 2018
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starstarstarstarstar 		Adjacent key not working
by: Anonymous

Hi Stephen, I have the same problem. Did you fix yours?

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