Run diode mode measurement of Pin S162 on cylinders. The measured value is 570, which is normal. Continue to measure Pin S163. The measured value is 570, which is normal. Judging by this, the open-circuited condition of Pin 1 relevant circuit is caused by pseudo soldering of cylinders around the edge of the lower layer.

Now, let's get the motherboard installed to the testing kit. Buckle up the extension flex cable of the display assembly. Then the charging port flex cable and the display assembly.

Connect the battery connector with the DC Power Supply. Short Pin 9 of J4300 to the ground with tweezers. The system will then detect power button press. Current reading on the ammeter is normal.