Help needed to fix a brand new Korg B2n (moisture on panel)

[rolemodel]

Hey guys! Long story short , a kid peed on the keyboard(last 2 octaves). Now 9 notes don't work. I opened it up ...cleaned it , cleaned the klm3598 panel with alcohol and wd 40 but no sound . Any advice on what else should I do next would be appreciated. Thank you lads!

[voip]

Difficult to say what to do next. The problem with pee is that it's basically an electrolyte, and so it conducts electric current well. This leads to electrolysis, and subsequent corrosion of active (i.e. with voltage on them) printed circuit tracks (leading to the tracks effectively being "cut"). This can also affect component leads, and solder joints, and even the slightest trace left on the circuit boards will cause issues with the functioning of the circuitry inside. It will also tend to wick under components, making it difficult to remove completely. Close examination for corrosion damage, preferably using a microscope, would be one thing to do, to establish the extent of the damage caused. Another would be to soak the affected parts in distilled, or de-ionised water, to try to dissolve and dilute any remaining pee residues, then rinsing the boards well with more fresh distilled or de-ionised water, patting dry, and then putting somewhere warm to dry out completely for a good length of time e.g. 50 degC for 24 hours.

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