Chosen Solution
Alright. I’ve searched a few answers here, and on the rest of the web. None of them seem applicable or the answer I need. Kind of like a similar question here. Water damaged phone. Did an ultrasonic bath. Comes on, says Temperature. iPhone is too hot. And it is. It seems that it’s just around the cpu. Obviously the CPU works, as it boots up and gets this error and can switch to the screen to make emergency calls. It does seem like the rest of the board is too hot; but mostly the CPU. Tried testing continuity, seems ok in the circuit around the CPU, and there aren’t any obvious signs of damage on the rest of the board. Any ideas guys? Update (04/14/2017) Also, what is this M7? Sounds pretty secretive
I would try freeze spraying the board to see what heats up first. That might give you a visual cue. You could also connect it to a power supply instead of the battery and gradually raise the voltage until you see what heats up first (again on a frozen pcb). Otherwise, you will need to check all the voltage rails. There might not be a dead short but one of them could be drawing excess current (look for a lower than expected voltage). This would heat the PMIC underneath which could make look like the CPU.
