Chosen Solution
This iPhone is water damaged. I soaked it in alcohol and got it working, but now it crashes if it’s on for more than a few minutes. It also won’t charge over 3%; I suspect it needs a new U2 chip. The home button is bad but it might be the cable in the back light, it’s happened to me before. Anyone have any idea what’s making it crash? It only crashes while in use, not when sleeping. Can’t remember if it was crashing when I went to restore it with iTunes initially; maybe it’s just an iOS issue? 11.3.1 It has: New batteryNew charging portNew vibrator
The water is inside the phone, on the logic board and under the shields, even under the IC’s. Soaking a logic board in alcohol is usually not sufficient for recovering a water damaged phone. At the very least, it should be lightly scrubbed with a soft brush and then soaked. Ideally, the shields should be removed and it should go in an ultrasonic bath. Not every water-damaged phone is recoverable and depending on the kind of liquid (salty, dirty, filthy), sometimes the success rate is quite low. As to what is wrong with your phone, it’s hard to say. Obviously there is something wrong with your charging circuit but it could be a lot of things. You need to start probing the circuit to understand what is working and what isn’t, there’s no “silver bullet” solution to water damage.
