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Repair Guide: iPhone 6 WIFI icon won't open (grayed)

We are trying to connect WIFI network with iPhone 6, but failed, because the iPhone WIFI icon won't open, it just displays grayed.  Is it the iPhone WIFI IC problem?  Anyway, here is the repair guide for this iPhone 6 WIFI problem.


Use screwdriver to remove the screws that next to the iPhone lightning port, and then put iPhone on the CPB screen separator, so we can open the iPhone display screen easily. After open the iPhone, carefully take out the iPhone motherboard.

For this problem, first we can replace the iPhone WIFI IC directly. After install the iPhone WIFI IC, turn on iPhone 6, but it stuck when it entering the Settings, so the problem isn't been solved. Next remove the iPhone WIFI IC and test several key point signals, we found the 14 pin doesn't has the resistance value. Now, we need to check iPhone CPU.


There is no Bus reset signal, the normal is 1.8V, we are going to borrow it from another place, and there is a 1.8V beside it. It's useless if we directly connect it, so we need to find a resistor to pull it up. 

 Put iPhone motherboard under the Stereo Zoom Microscope, and then remove a boot signal pull-up resistor 220K. Install the iPhone WIFI IC. 


Now, assemble the iPhone, turn it on, and then test it,  the iPhone WIFI icon can be opened smoothly, after connecting to a WIFI network, the iPhone WIFI function works properly. 

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