Open Xinzhizhao software, find a circuit reference of mobile phone motherboard using Hi1102V100, measure the power supply according to the schematic diagram, and replace a WiFi chip, and the fault remains.
Huawei's Nova5i screen is not displayed. After testing, it is found that the power supply is damaged, which causes REG not to step up the voltage without 5.8v, and can not generate plus or minus 5.5V.
Huawei Nova5i will not be able to boot, connected to the electric current, and the soleno fragrance finds the faulty component, and the replacement capacitor is turned on normally.
Huawei's Nova5i water damage has no backlight display, and BTB connector shows that the backlight anode has no diode value. Go directly to BTB connector Jump wire to BTB connector Fuse, and solve the problem.
