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2.0GHz, 2.3GHz, or 2.6GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache.

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Recently the Wi-Fi has stopped working

Hi, I have a MacBook Pro (Retina, 15-inch, Late 2013)

Recently the Wi-Fi has stopped working, however the Bluetooth works fine. I initially suspected the Airport card and replaced that, but the issue still persists. I've tried reseating the I/O cable without any luck. Would replacing the cable help ?

My I/O boards USB, HDMI and SD card reader all work fine. I thought the WiFi/Airport card connect directly to the logic board. @danj

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Yes the physical connector for the AirPort board is on the main logic board! But the signal pathing can be different. It all depends on what the signal is, Here we are looking at PP3V3 which is the power rail for the board. So you’ll need to get a DVM and carefully measure the two points at the connector Pin 1 & 18 and shell (ground)

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If both are present then replacing the cable won’t alter things.

Before you did anything what what happened? Maybe that can give us a clue.

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This is my second laptop so I don’t use it frequently. I just went to use it one day and the WiFi wouldn’t work.

The interface in network settings was showing weird localised strings: “<<localised.string>>”. Thinking it was a software issue I removed the interface, wanting to add it back but it now doesn’t appear at all ( system report WiFi just shows software Information).

Additionally Apple diagnostic returns error code CNW001 and says there is a wifi hardware issue.

Not sure I have the expertise to measure those pins, but I have ordered a replacement cable and will try that. Thanks for your reply.

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@danj So unfortunately replacing the IO cable also did no fix the problem. Anything else that I can try? Or will I need to resort to using a USB wifi adapter.

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Time to button it up and find someone who can diagnose your logic board. This might be an easy fix.

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