iPhone 5s completely dead board troubleshooting
I've got a customer's iPhone 5 that is completely dead. I got 0A on power supply (connected on battery connector) whit power button pressed and released.
I tried hard reset, DFU mode, replace the battery, replace the screen and power on only the board. However the phone doesn't respond to anything. I take off the shields and checked the board, but it looks ok, no corrosion points, no components smoked.
I would like help to start the board analysis. what is the better points to check in this situation? What is the lines and the values that I need to check?
UPDATE: I just put the phone to charge and after some minutes the all phone warmed up.