Iphone 7 Charging Problem Solution (Done)

Apple Iphone 7 Not Charging!

Case :

Apple Iphone 7 not charging, nothing happens when connect the charger and just 1mA current drive on USB charging cable power line. Phone works well with a charged battery, also there is no effect when phone is powered on and charger plugged.

Expected behaviour of the when the battery not connected and charger connected is valid voltage generated on VDD_MAIN line (about 4v) and boot loop on the screen about 6-7 sec. periods, and current drawing 17mA, 50mA, 110mA, 200mA and zero respectively.

This issue can be caused by the charging flex, but changing charging flex resulted the same symthoms. Not charging, no current draw!

Second suspecious part(s) are the parts placed arround charge flex b2b connector on board or itself of the connector, and there was no problems at all.

The classical hero is that kind of problem is generally Tristar IC known as U2 :610A3B

Our hero is buttom side of the iphone 7 logic board (below NAND Memory). But there is a little problem with that, it's some part under the metal cover, remove the metal cover carefully and remove the Tristar Ic, after changing problem solved!

It draws 0.9A, and it's nominal current on charge for iPhone 7.