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Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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WIFI not connecting, speaker icon greyed out

i recently upgraded to Yosemite and started experiencing WIFI issues. after getting fed up with the poor wifi in Yosemite i wiped my hard drive and reinstalled Mavericks hoping to resolve the problem, however now my wifi will not connect in Mavericks either. i also tried booting Lion from an external drive and the problem remains. since then i have tried a PRAM and SMC reset and also tried repairing permissions however nothing has helped the issue. in fact since the SMC reset my speaker icon in the menu bar is now greyed out and wont allow to adjust volume. i have also run an Apple Hardware Test but everything is checking out ok. starting to wonder if my logic board might be fried, any ideas?

Thanks,

Josh

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Upgrading your OS wouldn't cause the WiFi to go. As you have noted changing it back didn't change anything. It's just bad timing the WiFi adapter just happened to give up the ghost at the same time.

Can this be fixed? Yes! Follow this IFIXIT guide: MacBook Pro 13" Unibody Early 2011 AirPort/Bluetooth Board Replacement.

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josh estará eternamente agradecido.
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