Hello, I have an iPhone 11 which does not turn on. On the DC power supply, when I press the power button it does a normal boot sequence until about 120 milliamps, before going to 0. The boot sequence only lasts about 3-5 seconds. It just loops infinitely like this, and does not stop. 120 milliamps is the most it has reached and I'm not sure exactly what might be shorting. Does anyone know which chip or line this may be related to? Thank you!!