The guide is 100% ok, just it seem that there was some "issue" with the IO board, since I am abroad it was easier for me to find another solution locally since I needed to solve the issue and was not able to wait for the whole process of claim a warranty on the board.
I had the same "no audio" (mic) issue with an IO board (purchased from ifixit also, p/n 5000826, IF 188-069-1), I took my MB to apple service and they installed an original IO board and got audio back.
일단 획득하면, 귀하께서는 그들의 시간당 평판 획득 도표를 볼 수 있습니다.
도표가 어떻게 보여질지에 대한 미리보기입니다:
아직 획득한 평판이 없습니다.