Chosen Solution
So I have an iPhone 8 here that won’t come on and the “battery and cable” icon flashes once for about half a second. Then the phone becomes completely unresponsive. I’ll save the time and just say I’ve narrowed it down to the motherboard. When I first received the phone I noticed that a component the RV3C002UN was torn from the board. I replaced that and noticed a diode next to it, with greatly appreciated help from Minho, I have identified and changed this TVS (ESD202-B1-CSP01005). Now all it does is flash the “cable and battery” icon once for about half a second and quits responding. I am at a bit of a loss as to where to go from here, could anyone please tell me Where I should go from here?
In reference to my Help identify iPhone 8 logic board components to your earlier question, have you properly identified which component is missing? The two square components are the MOSFET’s and the two smaller, rectangular ones are the TVS diodes. The thing to note is that the two I2C0 lines that transmit battery data go through those components. They have to be replaced and you should be probing them to insure they aren’t shorted to ground or not connected (open circuit).
