For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
bought a Macbook Pro 15 Retina mid 2012 with damaged audio jack, internal speakers work fine. When I plug in a known good audio board 821-1548-A (headphone jack), nothing works, no internal speakers, no headphones, and I get the red light inside port.
I took the known good jack from another Retina 15 early 2013 and it is definitely OK. Will removing R6896 kill the digital out functionality? If that's the case, I can live with that. Thank you for the useful answer.