1. Power supply issue: The primary factor that prevents the mixer from working properly is the power supply issue. If the power supply is not properly connected or the power outlet is dead, the mixer will definitely not start.
2. Machine malfunction: Prolonged use of the mixer may cause internal blockage or malfunction, and the mixer may not function properly at this time. If the machine is placed improperly, it may also cause the machine to not start properly.
3. Safety switch: The mixer is equipped with a built-in safety switch, which can only be activated when the cup is placed on the base and the lid is pressed. If the safety switch is damaged or the lid is not pressed, the mixer cannot function properly.
4. Spare parts issue: After using the mixer for a long time, the blades and sealing rings are prone to wear or damage, which will also lead to the mixer not working properly.