Postagem original de: Minho ,
Did you check ALL of the PMIC outputs or just the main ones? A faulty subsystem can pull the whole system down as well and it is often overlooked. If they all check out, then check the main subsystems that aren’t powered by the PMIc, such as MESA,CHESTNUT, BACKLIGHT. Then check the I2C lines to insure they are balanced and within range and take a look at the PMIC Reset lines (those that can be probed) to see if the problem is there. Finally, check the BBPMU outputs as well as a damaged BB system will impede the phone from booting. Also, what areas of the board were more corroded, that could give you some clues about where the damage actually is.