Is the charging assembly PCBA really responsible for battery charging?
Or is it just supplying the 5V from the charger thru the flex to the motherboard, which is in fact responsible for the charging?
There are additional "data" pins on the battery, which I suppose are also used during charging to report battery temperature etc., but these pins are not directly connected to the flex connector.
So I think that the motherboard is responsible for charging.
My phone is not charging, but i can measure the 5V from the USB on the motherboard connector at the end of the flex. Will it help to change the charging assembly?