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Modelo A1418 / mediados de 2014 / 1.4, 2.7 y 2.9 GHz Procesador Core i5 o 3.1 GHz Core i7

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iMac EMC2805 Internal Speaker option Missing in Sound Preference Menu

iMac EMC2805 Internal Speaker option missing in Sound Preference Menu I can only see digital output showing. Sound working with Headphone jack, reset SMC, reinstall two macOS version (EL Captain as well as High Sierra) same issue!

Logic Board 820-4668-A faulty??

Please guide what is the solution for the issue?

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Update (08/17/2018)

Sound output from the headphone jack was working, connector from Logic board to headphone jack was disconnected still same condition, Headphone jacket was not available for purchase. We managed to use sound from USB speaker.

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2 Respuestas

The headphone jack has a switch element within it it looks like that’s broken or messed up some how. Did you plug in a headphone which was an odd length or size? It could have damaged it.

Luckily Apple changed the design so you can replace the jack! It’s just not that easy. You’ll need to take the logic board out to get behind it to remove the jack assembly.

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Sound output from the headphone jack was working, Connector from Logic board to headphone jack was disconnected, still same condition! Headphone jack is not available for purchase. We managed to use sound from USB speaker to get around the issue.

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This is the correct behavior! The assumption is if you plug in the headphones (left plugged in) you don’t want the internal speakers to also be active. This is how most PC’s work, and how all Mac systems work. My TV’s and stereo also work this way.

Here’s a closer look on how the headphone jack works

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The simple act of plugging in the plug breaks the short to the internal speaker lines.

If you want an either or both with the headphones plugged in you’ll need to get your self a pair of wired (using either the headphone jack or USB plug) or wireless Bluetooth speakers (with the headphone jack you’ll need a spitter). You’ll then need to manually to enable which you want on. With Bluetooth the menu bar can be used.

In your case I’m suspecting the switch contacts within the jack are messed up. The easiest way to fix this is to replace the jack iMac 21.5" Headphone Socket and Cable (14/15)

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Rajeev estará eternamente agradecido.
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