Yamaha Keyboard MK Board repair

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Hi All

I have PSR E 233 and 2 Keys are not working. by looking at them i noticed the Carbon or Graphite print is broken . is there any ink i can use to re-draw this path ?
 

happyrat1

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Search Amazon for "conductive ink"

Are you sure the open circuit is not intentional at that point?

They are 2 poles of a contact switch.

If so, it's the conductive silicon button that needs attention.

 

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