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My keyboard displays Unexpected Error

when I turn on it displays for me,

Unexpected error!

Turn the power off and on again.

pnm_task.c/3580/12110239-255

please solve this problem any help is appreciation

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3 Comments:

hi, ser I have yamaha piano PSR-S700 when I turn on displays for me Unexpected error how can I fix it?

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Have same problem showing error, tells me to put on and off.

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Sam problem help me

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