What is the reason why the solar street light fails to light up?

1. First, check whether the battery indicator light of the controller is on. If it is not on, check whether the connecting wire between the controller and the battery is off, and the connecting wire is normal. Use a multimeter to check the battery voltage. If the battery voltage is normal, replace the controller. 2. Check whether the load indicator light of the controller is lit, and use a multimeter to detect the output voltage to see if there is any voltage output. If there is no voltage output, replace the controller. 3. Check whether the voltage at the input terminal of the LED driver is normal, and check whether the fuse of the LED driver is in good condition. If the fuse is in good condition, use a multimeter to check whether the output voltage of the LED driver is normal. If it is normal, please replace the LED lamp head. If not, please replace the LED drive.