주요 콘텐츠로 건너뛰기

2011년 하반기 모델, A1278 / 2.4 GHz i5 또는 2.8GHz i7 프로세서.

591 질문 전체 보기

EMC 2555 logic board dead

Hello

i have this old EMC 2555 logic board from an macbook pro 13'' . I've tried to look at it to spot anything obvious, but i can't seem to find anything. it won't power on, when i plug the DC in, the magsafe flashes between a dim green and orange light and thats it. the power indicator is none responsive, even with a charge on the battery - it is completely dead.

any ideas?

i know you might say i should just buy a new board, but this is purely to see if i can get in going again

Update (01/11/2017)

mayer im pretty sure its that one, heres some pics

Block Image

https://s23.postimg.org/430fohw23/IMG_05...

Block Image

https://s24.postimg.org/sc7owkd1x/IMG_05...

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 0
댓글 1개
댓글 달기

답변 2개

선택된 답변

Try a new DC jack to eliminate this being the cause. Grab a schematic and board view for 820-2936, and measure the power rails PPBUS_G3H and PP3V42_G3H. If these are lower than it says in the schematic, or not present, you need to investigate this further. Feel U7000 (charging IC) to see if it is getting hot, this can sometimes short to ground.

Beyond this, check the board for any brown probe points (indicates cleaned liquid damaged). I assume you have plugged it in without the battery connected too?

해당 답변은 도움이 되었습니까?

점수 3

댓글 3개:

Thanks, Ill try - where do i look for the schematics?

I have checked for the liquid damage, and nothing obvious - I have also tested it without battery too.

Google "820-2936 schematics" and grab a board view too

Thanks man ill try

댓글 달기

halo dou you have board view 820-2936-b?

해당 답변은 도움이 되었습니까?

점수 0
댓글 달기

귀하의 답변을 추가하세요

Emil Wang 님은 대단히 고마워 할 것입니다.
조회 통계:

24 시간 전: 0

7일 전: 0

30일 전: 0

전체 시간: 1,500