Apple iPhone 6 won't turn on (dead) -- what to do?

Apple iPhone 6 won't turn on,  it is dead.  So sad for the users, becasue they can't use it if the iPhone won't turn on.  However,  perhaps your iPhone 6 still can be saved, what to do? 

Check iPhone circuit diagram on WUXINJI Dongle, so that we can know the working principle for iPhone 6, and then we can fix it easily.

iPhone Motherboard Short circuit

1.  There is a short circuit issue on PP_BATT_VCC or PP_VCC_MAIN

First measure  the diod data of  PP_BATT_VCC or PP_VCC_MAIN with multimeter, it's abnormal.  Then use rosin method to find the specific short-circuit position. After find the short circuit capacitor, you can remove it by Precision Titanium Tweezers.

2. There is short circuit on output voltage of power IC

Respectively measure each output of the bypass capacitance measurement resistance, find the short circuit parts.  And then use rosin methods to find the specific short-circuit position.After find int, remove it by tweezers.

Damaged IC

1.  if  the USB control IC is damaged, it will cause iPhone 6 stuck on White Apple logo and won't turn on.  Measure the iPhone USB control IC, if it is damaged,  you can replace the new one.

2. if the compass IC is damaged, it will cause iPhone reports unknown error 4013 and won't turn on. After measurement, you can replace it the new one.

3. If the iPhone Nand flash is damaged, it will cause iPhone blue or red screen and then auto restart. After measurement, you can use weld the U0301 first, if not working, then you can re-install or replace the iPhone NAND flash.

4. If the CPU is damaged, it will cause iPhone stuck on 100mA and won't turn on.  Connect iPhone to PC, if it can't identify the hardware, which means CPU not working, re-install or replace U1202; if it can indentify the hardware, try to flash it with iTunes, if the it reports iTunes error 4005/4014/14/40, then basically it is CPU  or iPhone Nand flash error, you can re-install or replace it.