iMobile Repair School

Lesson 1 - iPhone switch button greys out (Wi-Fi IC Replacement)

iPhone switch button greys out unable to toggle on Wi-Fi and Wi-Fi chip is short-circuited.

Customer sent an iPhone 6s for repair. iPhone 6s Wi-Fi button greys out and Wi-Fi won’t activate. Other functions are normal.

Figure 1 Wi-Fi button greyed out.


Diagnose

Step 1 – Test circuit with a voltmeter

After connecting the phone with a power supply, we measured the values of the VCC MAN and the result is “ERROR”. It indicates a potential short-circuit in the Wi-Fi chip.

Figure 2 Connecting to a voltmeter