Origineel bericht door: jessabethany ,
For diagnostic purposes or a fun hobby project on your own phone—just lay a wire connecting vccmain to battvcc at the pads that q1403 used to sit on. This will let you continue diagnosing and the phone will boot this way if there are no other problems. Since a phone can not boot without a battery connected at all (i.e. a phone can not boot from just usb5v) then I would guess that there is a chance that the phone can not boot without the mosfet at all (although maybe it can, i’ve always just jumped it and never tried without) as long as the phone is getting battery data through tigris.