1. Check the power socket: Confirm if the power socket has electricity, and try using other electrical devices to test if the socket is working properly.
2. Check the charger and battery interface: Confirm that the charger plug is tightly connected to the electric vehicle battery interface, without looseness or dirt, and try unplugging it several times.
3. Check the status of the charger and battery: Charger: Observe whether the charger is damaged or abnormal, and replace the charger if necessary for testing. Battery: Understand the current battery level. If the battery is fully charged or close to full charge, it may be a normal phenomenon for the green light to light up after plugging in the power supply; If the battery level is low, it may be an internal fault of the battery or charger, and further inspection or repair is required.