I've personally never experienced a keyboard failure. However, of the few that I know that did send their arrangers back to the factory, the wait time varied from 2 to 6 weeks before it came back to them. That's why I emphasize backups so much - including keyboards.

Cheers,

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)