Liquid damaged iPhone 7 not charging / detecting USB, VDD_Main short?
I am sat here scratching my head trying to figure out what’s going on with my iPhone 7, the phone in question has suffered from liquid damage and was not booting. After running the board through an ultrasonic cleaner it has come back to life, booting up fine and drawing normal amps from DC power supply. The issue I’m now facing, is the phone is not detecting a lighting cable or taking a charge. (I have already replaced tristar, with no results).
After checking some caps on VDD_ Main, it appears this line is shorted to ground, all the caps i have checked show continuity to ground (one probe on either side of the cap, multimeter goes beep).
So do I have a short on VDD_main? I suspect not, as the phone is booting fine and not drawing high amps, but why is my multimeter giving these results? What am I missing here? And what could be causing the phone not to charge? Where should I be looking?
Ist dies eine gute Frage?