Solved: iPhone 6S WIFI module short circuit （iPhone overheat） The iPhone 6S is overheating caused by WIFI module IC short circuit, what to do? Replace it directly? As I think, if the WIFI still can work, then you don’t have to replace it, because after you replace the iPhone module IC, you have to use PCIE Nand programmer to re-write the WIFI address on iPhone Nand flash. Now, let’s repair it!
Disassemble the iPhone by phone opening tools, remove the iPhone motherboard, and then connect it to DC power supply to test, after booting for a while（about 10 seconds still not enter the IOS）, it shows large current and power down. According to the above phenomenon, we suspect that it may be a problem of WIFI（because the current is normal when you start the boot）. The boot process of iPhone: press the iPhone power button-- power IC supply power to iPhone CPU/ iPhone Nand flash/ display IC/ light control IC/ touch IC--CPU start to read the software of Nand flash-- start the WiFi part in 10 seconds-- start the baseband section in 20 seconds to work. Based on this boot process, we're judging that iPhone WiFi module is damaged. Because this iPhone 6S can be turned on with iPhone battery and WIFI can be open after booting, it just overheat caused by large current, and then the iPhone temperature is too high. Use rosin method to make WIFI turn white, and then boot it to test, after a while, the iPhone is seriously overheated. Disassemble iPhone motherboard, observe the WIFI module under the 7-45X Trinocular Stereo Microscope, it's obviously discolored, which means the WIFI module is short circuit. Carefully shovel the shell of the WiFi module, measure the diode data of all capacitors with