Repair LG KP500 : Mic Trouble (No Voice)

Flaw statement:In lg river sometime mic starts not responding during meet so at callers end no sound generates. Due to this we can't platter vocalisation in melody equipment and can't piddle any telephony decent.Shift resolution:For this mic bleach we score to survey all these process maneuver by rank:1. No. we should change new mic and then draw for voice strong.2. Then spick both