The main reason is that it is used when charging, because the phone is in a high voltage state at that time, and it has a great load on the chip of the phone (I did this last time and the chip burned T-T).
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The most likely cause is the phone water automatically shut down, and then turn on.
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The electronic chip itself is aging and its quality is faulty External damage The working voltage is too high The working temperature is too high during welding the temperature is too high for a long time Power shock (static electricity, lightning strikes, or power pulse when the power supply is faulty)
There are generally the following reasons, one is that the charging time is too long, resulting in a short circuit, burning the chip motherboard, the second is that the mobile phone into the water, resulting in a short circuit, burning the chip, the third is that the mobile phone has been used for a long time, the chip is aging, and the daily load is seriously burned