dead iphone 6s

[vbiste]

fall iphone 6s
power supply = 4.5v
vcc is ok = 4.3v
Tristar 1.8v ok 3v ok 5v ok
no short in vcc or bat_vcc
power sup amp = 0.04a
with battery and cable charging go 0.44A after few seconde go 0A and loop
mainboard in normal temperature
??????????????
whats this strong problem
any help please
thanks

[7Axis]

First off lower your power supply to 3.8V, 4.5V is too much.

If you haven't found a fault yet then what you do is you check your voltage rails.

If it's boot looping at ~400mA then it's likely PMIC or CPU related. check for low or missing voltages in lines produced by the PMIC.

[vbiste]

Originally Posted by 7Axis

First off lower your power supply to 3.8V, 4.5V is too much.

If you haven't found a fault yet then what you do is you check your voltage rails.

If it's boot looping at ~400mA then it's likely PMIC or CPU related. check for low or missing voltages in lines produced by the PMIC.

Thanks for your resposte
i need check point for volt in and out PMIC
in c4003 c4004 c4005 not present any volt is 0v

[7Axis]

These lines are connected to U4000 (display driver) however your phone doesn't boot so the issue is something else.

Check PP_CPU, PP_SOC, PP_FIXED, PP1V8_SDRAM