TOP 5 Ways to fix iPhone 6S won’t turn on fault (reasons and solutions) Today, we are going to fix iPhone 6S won’t turn on fault. As we know, iPhone motherboard is sophisticated, we can use WUXINJI Dongle to check iPhone schematic diagram and use microscope to observe it, so that we can find the reasons easily. Here, we share 6 top ways to fix iPhone 6S won’t turn on fault.
1. The iPhone 6S is leaked or large current In this case, we need to need to use Digital Multimeter to measure the diode data of BATT_VCC and VCC_MAIN! If there is a short circuit, we can apply some rosin on the iPhone motherboard component, use hot air gun to smoke it, and supply voltage on short circuit line, the voltage starting from 0 and gradually increasing, and then you can find the short circuit parts. And then fix the short circuit part. 2. No response when booting. Measure whether these is a VCC_MAIN, if not, replace the charge IC U2300, if VCC_MAIN is normal, and then replace the power IC U2000. 3. Stuck on Dozens of MA when booting. This fault mostly caused by CPU or iPhone NAND flash virtual welding or damaged. For water damaged iPhone, you can replace power IC/ audio IC/ compass IC/ USB control IC/ charge IC. 4. Reports different iTunes error If it reports iTunes error 4005/ 4014/ 9/ 14/ 40, usually it is caused by iPhone Nand flash or iPhone CPU. Because the iPhone CPU is unable to weld, you can re-install it or replace the Nand flash, and then flash it again. If it reports iTunes error 1/47/48/50, usually it is baseband part problem; you can re-install iPhone baseband CPU and power IC. Moreover, damaged compass
will cause iTunes error 4013, just replace the compass IC. If it reports iTunes error 56, mostly it's caused by NFC module virtual welding or damaged. If baseband power IC is virtual welding, you can re-install or replace it. 5. Stuck on White Apple logo when booting Replace the USB control IC U4500 charge IC U2300. If the fault still exists after replacement, then it should be the CPU or NAND flash problem, you can re-install the iPhone NAND flash.
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