1. It may be because of the failure of the treadmill, so it is necessary to check whether the treadmill works normally.
2. It may be a sensor fault, so it is necessary to check whether the sensor works normally.
3. It may be because of the failure of the drive board, so it is necessary to check whether the drive board works normally.
4. It may be that the control panel is faulty, so it is necessary to check whether the control panel works normally.
5. It may be that the power switch is faulty, so it is necessary to check whether the power switch works normally.
It is suggested that you investigate one by one according to the above reasons and seek the help of professional maintenance personnel to ensure safe and normal use.