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open pcb & select multi meter at ohmic value
check connectivity on mic pad at pcb if shows anythink connectivity just replace mic if does not shows anythink when you checked connectivity find wich contact are brokened
Method;how find wich pad are broken
place one probe of multi meter on pcb ground & check both pad of mic on pcb when does not shows connectivity on any pad of mic remember it after that arrenge other same type pcb & place any probe on mic pad that you identified & check connectivity at near about when shows on multi meter full conductivity & remember it now resold jumper between mic pad & that part that you searches in your foulty circuit board
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