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No audio device - do I need to replace the logic or I/O board?

I have a mid-2014 Macbook Pro that has no sound at all and doesn’t show any output devices. Diagnostics shows error VFF001 (there may be an issue with the audio hardware).

I found a forum thread where someone could fix this by replacing the I/O board, however it was for a different model. I’m not sure, is the audio card located on the I/O board or the logic board for my Macbook? Which one would I need to replace?

Thanks!

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Your system uses a different setup! Apple originally had the Amp logic (Yellow) and headphone (Grey) on the main logic board as you can see here:

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Sadly this is what needs repair or you’ll need to replace the logic board.

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