crwdns2934241:0crwdne2934241:0 iCalfixit

crwdns2934249:0crwdne2934249:0:

ic u2 functions is management the data transfer, charge, and boot

ic power functions is supply power to all ic

battery drain common there are have short on the machine ic or capasiotrs

crwdns2915684:0crwdne2915684:0:

open