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White wine is very acid and the residue needs to be cleaned from the circuit board under the keys using distilled water - u know the stuff they sell to use in steam irons. In the 80s when I ran a TV studio we used to have all sort of problems with that bubbly white whine that celebs like getting int...

I dont know much about piano (digital or Acoustic) other than learning to play. But professionally I deal with the repair of a great many electronic devices and your problem sound exactly like the old problem of dry joints (for those who dont know these are joints that the solder has cracked round t...