Question about M-Audio ProKeys Sono 61-Key Portable Digital Piano
The resting (centering) of the PB wheel has a problem. It is LIKELY mechanical in nature. You will have to open the unit to investigate or take in for servicing. If you open it yourself, have two people to help hold the two parts of the shell to avoid damaging the ribbon cables when opening.
Posted on Mar 12, 2011
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Posted on Jan 02, 2017
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