No volts to PP3v3_ACC Line to Tristar. No amps
So I'm in the process of a data recovery and am stuck in a spot. Short story customer dropped iPhone, now phone acts as if in dfu mode. No image on screen and no amps coming through when plugged in.
Computer recognizes in recovery and when plugged in using ammeter no amps are coming through. Already swapped shorted capacitor on pp3v3_acc line and currently getting no volts through that particular line.
I know you need all three rails incoming to provide voltage for this chip to work. PP3v0_tristar and pp1v8_sdram show correct voltage. PP_vcc_main is good as well as PP_batt_vcc.
Rail pp1v8 is shorted and haven't looked at that yet but figure I might as well start with tristar.
To my understanding pmu u1202 provides power through cap c1299 to u1700 tristar.
Is it possible for u1202 pmic to be the culprit even if other rails coming out of it are reading correctly?
Biggest questions is why is this rail getting 0 volts.
Any help would be greatly appreciated, thanks in advance!
Questa è una buona domanda?