1, may be the upper and lower parts of the juice cup is not completely docked (motor is not energized), try to re-cap into the cup cover; 2, may be the juice cup is not enough power, try to connect the charging cable and then use it; 3, may be the juice cup battery is damaged and can not give power to the motor, you need to apply for after-sales service; 4, may be the juice cup motor burned out (you can smell the smell of burnt), you need to apply for after-sales service.