It may be that the phone is not placed in the central position of the charger, so it cannot recognize the charge; The charger may be damaged, need to contact after-sales maintenance; It may be that the charger and the mobile phone do not fit, you need to buy an official. In the charger, the fan generally plays a role in heat dissipation. The general heating device has a power tube, thyristor, radiator, and the power tube is generally fixed on the radiator. If the power tube is not fixed tightly, it will appear that the power tube is burned out due to overheating