After getting the mobile phone, start the test, press and hold the volume up button and there is no response, and the sound level has not changed. Press and hold the volume down button, and the sound of the mobile phone will be reduced. Take out the motherboard after disassembling, and measure the grounding value as OL, indicating that the motherboard is disconnected.
Dismantle the machine, remove the motherboard and observe carefully, and find that the motherboard is broken. After the flight, the power-on test shows that the WiFi signal is full instantly.
Xiaomi 8 can't adjust the volume. Pressing the volume up button doesn't respond.After measurement, the mainboard was disconnected, the power supply was removed, and pin and Jump wire were sent to Capacitor R601 in the lower left corner, and the fault was repaired.
Restart repeatedly e mobile phone is turned on, the Xiaomi key of the mobile phone can be turned on normally, and a fault can be found Restart repeatedly e c1xt1 is opened.