Model A1297 / 2.66, 2.8, 2.93, or 3.06 GHz Core 2 Duo processor

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Earphones shut off speakers but do not convey sound.

Earphones work in other devices but not in the macbook, and it is difficult to extract. We are afraid to plug it in again because we think the receptacle is bent or defective and the sound may stop working on the speakers as well if we stick in another plug. I think it needs a new socket but do not know how to replace it. Is it a user fixable operation? Must the computer be opened? And if so, how? I have worked on other computers, but not this type. If I knew how to get inside, I could probably fix it if it's just the jack that's defective. Thanks.

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Can you supply us the last four digits of your serial number so we can correctly ID which model you have

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David - The headphone socket is part of the Left I/O board on the older model and part of the main logic board in the Unibody model. In both cases it is a combo analog / digital socket.

You might be able to stick a toothpick into the socket and very carefully re-align the contact switches (2 of them) one controls which output internal Vs external and the other between analog Vs digital. Use a good magnifier to inspect the socket and use the microphone socket as its' the same socket type.

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