There are mainly the following reasons: 1. The battery of the electric scooter is broken. Plug in the charger for the electric scooter. Originally, it could not be turned on, but it can be turned on when it is charging. That is the problem with the battery, and the battery needs to be replaced. 2. The computer of the electric scooter is broken. Plug in the charger for the electric scooter, if the electric scooter still cannot start when the charger is charging it, it means that the stopwatch of the scooter is broken and needs to be replaced (note: please turn on the stopwatch under your feet Pedal, unplug the plug-in of the stopwatch and the controller, and connect the controller with a new stopwatch. When unplugging the plug-in of the stopwatch and the controller, it is best to connect the cable of the stopwatch to the controller one-to-one to avoid You have wrongly connected the cable between the computer and the controller). The maintenance method is as follows: first step, now unplug the link of the monitor and plug it in again. The second step is to open the plastic cover on the right front side of the electric vehicle, find the cable corresponding to the display screen, unplug it and plug it in again. The third step, if it still doesn’t work, you should contact the manufacturer.