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2.0GHz, 2.3GHz, or 2.6GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache.

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No Sound from Internal Speakers or Headphone

One day while playing music the sound stopped working. Nothing coming out of headphone jack or internal speakers. However, sound still works through Bluetooth. I’ve tried all of the software related fixes already (kill coreaudiod, reset PRAM, reset SMC, check for mute, etc) - none of them worked. The OS seems to recognize when the headphone is plugged in and when it’s not and it shows the appropriate option under the SoundPrefs.

1) Are there any other software related tests or fixes can try?

2) Does the fact that sound works under Bluetooth mean that the sound chip is basically working?

3) Could it be the amplifier that drives the speakers and headphones? If so is that replaceable? Is the whole “sound card” replaceable or repairable on this model?

Thanks.

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These kinds of issues can sometimes happen when there is damage to either the headphone jack itself or the internal speakers. With Bluetooth turned off and headphones disconnected, what do you see when you attempt to adjust the volume? Does it show the volume adjusting or do you get a prohibitory symbol (a circle with a slash through it)? You can also try signing in with a guest account to see if the issue is related to your user account. Additionally you could try a PRAM reset (hold P+R+Option+Command during startup) to trigger the startup chime to see if sound is working in general (though some models won’t chime during startup so this isn’t the best test). If you have a bootable external drive you could try booting into a different drive - this would help you determine if it’s a hardware or software issue.

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Thanks for these suggestions. Adjusting the volume looks normal in the various volume controls and the Sound Prefs dialog. Logging in as “Guest” still has no sound. I had already tried resetting the PRAM. It didn’t fix it but it also was hard to tell if it actually did anything at all. I didn’t notice any changes after doing the reset. Have not tried a bootable external drive.

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Have you managed a solution? I’m having the same issue after I’ve accidentaly spilled some water on my my left speaker.

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Hey, I had the same thing happen; spilled water and miraculously saved my computer but when I went to use it I noticed there was no way to turn the volume up/down & no sound coming from any apps. I would just get the volume pop-up with a prohibited symbol (circle with a line through it) even with earphones plugged in. No "Internal Speakers" option anywhere that I could find, PRAM thing didn't work either, neither did killing audiod from the terminal nor did jamming earbuds into the jack to clean it.

Anyway I was able to correct it by going to System Preferences > Sound > Sound Effects

Then on the drop down next to where it says "Play sound effects through:" I had Multi-Output Device selected, I changed it to "Internal Speakers" instead. I then went to "Output" tab and the Internal Speakers option was there again so I selected it and this solved it for me.

I made an account just to post this because I was going crazy trying to fix it so hopefully this works for you or anyone else having the same issue.

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No, I never got an answer. I'm using an external Bluetooth spkr instead.

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Fred zal eeuwig dankbaar zijn.
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