주요 콘텐츠로 건너뛰기

기기를 수리하세요

수리할 권리

상점

2011년 상반기 모델, A1278 / 2.3 GHz i5 또는 2.7 GHz i7 프로세서.

813 질문 전체 보기

Why aren't my MacBook Pro's internal speakers working?

About 3 years ago I spilled milk on my MacBook Pro. It was fine until a few weeks ago when it wouldn't turn on. Genius bar said it would take $800 to repair. Opened it up and scrubbed down all parts with rubbing alcohol and let sit out overnight. Started from logic board with tweezers and I heard the startup chime. Booted up as usual and brought me to login screen. Keyboard was not functioning in certain areas, but the MacBook was otherwise normal. I plugged in a USB keyboard and that worked fine. Sound was working and everything was normal. However, the sound stopped working yesterday. No startup chime or anything, and when I went into system information, it said that no internal speakers or Microphone were present. It does not recognize headphones either. The internals are not corroded so far as I can tell. I've taken out both speakers and rubbed the connections with isopropyl alcohol. What could be wrong with it and how do I fix it?

This is what I see when I go to system information and go to the Audio tab:

Block Image

답변되었습니다! View the answer 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 2

댓글:

Update:I received the keyboard and installed it. Still no sound/usb. I quit the sound driver and restarted the computer. I reset the PRAM and the SMC. I updated all software and I did a complete reinstall of the operating system, to no avail.

Not sure what could be causing both sound and USB problems.

I added an image of what happens when I go to system information and click on the audio tab. It knows that it should have internal intel speakers but it says that its value is 0, which I believe means that the Mac doesn't recognize that the speakers are connected.

Everything else besides sound and USB is working fine.

UPDATE: I just ran extended testing with Apple Hardware Test and it said "No Trouble Found". I'm not sure, but does that make it a software issue?

2에 댓글 더 나타내기

의견 추가하세요

OPEN ALL THE TABS

RAM Upgrade Kits for Mac

키트 쇼핑하기

Enough RAM
For All The Tabs

키트 쇼핑하기

답변 2개

선택된 해법

Recheck your speaker to logic board connections.

해당 답변은 도움이 되었습니까?

점수 1

댓글:

I rechecked the connections, but there was no change. Could it be a partial failure of the logic board? It would seem odd for that to happen after I cleaned everything with Isopropyl alcohol and left it overnight in front of a fan. I'm not sure what steps to take from here.

Just cleaned the contacts with Isopropyl alcohol and no change.

I ordered the keyboard replacement, which should be here Friday, I am wondering if that could be causing the issues.

Do you see a red light in the audio port?

No, and I checked with a plastic pick to see if any debris had flipped the audio switch on and it was clean. I plugged in and unplugged a headphone adapter several times and it had no effect.

12에 댓글 더 나타내기

의견 추가하세요

Hi,

I had the same problem, and I resolved it today. I had checked the speaker connections but they were all in tact. I ordered a brand new logic board and put it in today. When I turned on my computer the speakers worked great.

해당 답변은 도움이 되었습니까?

점수 1

댓글:

Would it be possible for a USB sound card to fix the issue?

의견 추가하세요

귀하의 답변을 추가하십시오

Robert 가/이 대단히 고마워 할 것입니다.
조회 통계:

24 시간 전: 0

7일 전: 0

30일 전: 10

전체 시간: 5,117