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Procesador Intel Core i7 de cuatro núcleos a 2.2 GHz (Turbo Boost hasta 3.4 GHz), 2.5 GHz (Turbo Boost hasta 3.7 GHz) o 2.8 GHz (Turbo Boost hasta 4.0 GHz) con 6 MB de caché L3 compartida.

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No speakers (but headphones ok) after logic board removal battery job

I followed the full instructions from iFixit to remove most of the guts of my laptop in order to do a battery replacement, as described here:

Reemplazo de la batería de MacBook Pro 15" con Pantalla de Retina de Mediados de 2015

Upon completion of the job, everything works except there is no sound whatsoever from the speakers.

I get sound from the headphones just fine if I plug them in.

If I unplug the headphones, the system preferences correctly sees that it should be feeding sound to the internal speakers (so it is not just stuck thinking it has headphones). Yet I get no sound whatsoever from either speaker.

What should I check?

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I think you just didn’t notice the headphone jack had failed or it just was the unlucky to break at the same time you where replacing the battery.

Just the same check your speaker connections cables labeled Green and Orange here. Make sure the wires and the contacts are not damaged.

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The jack is part of the logic board, sometimes the switch elements within it mess up

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The contacts can rotate and/or dirt gets in the way. Use a toothpick to test them.

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Hi Dan. Thanks for the suggestion. However if I look in System Prefs...Sounds, I can see that, with no headphones in, it lists the device "Internal Speakers", and if I then plug in headphones, it lists the device "Headphones." So wouldn't this mean it is correctly sensing whether or not headphones are plugged in? I can't think of how it would detect that other than with that same switch mechanism that the headphone plug physically interrupts. Am I missing something about that?

Also have checked the cables several times and they seem perfectly seated (unplugged and plugged back several times).

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@jiperl - You may need to look at the connector contacts for damage. Take a couple of nice tight and crisp pictures of the connector faces both the cable end and the logic board and post them here for us to see Agregar imágenes a una pregunta existente

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Dan. Really appreciate your responses. Added six images. Really feels like they are seated correctly. Don't see any damage to cables. Particularly strange that it is not just one speaker but both having same issue.

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@jiperl - Well you got me scratching my head here ;-}

The obvious areas are clean that leaves the logic board its self has some damage in the lines to the DAC.

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Dan. Thanks for checking my work. I'll open it up again and see if I've somehow damaged something on the logic board. Any advice on where the relevant components might be on that board?

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