current draw fluctuating when power button pressed
Hi , i have an iphone 5s which had a charging issue , i changed the U2 and it was working fine i charged battery fully and phone was ok .
I replaced the shields ,put the phone back together and it didnt work .
took it apart again and found U1600 looked a bit damaged , i thought i was careful but maybe i caught it when replacing the shields , anyway i have changed U1600 but still the same .
when connected to dc power the amps fluctuate (see this video)
What does this indicate . ?
I have checked PP_BATT_VCC_CONN and its good 3.8 V
I thought on the schematic it listed the critical voltage lines but i cant seem to find them .