The specific operation steps are: 1. First, we need to find a screw. First, we need to separate the fixed base. Then we will see a screw hole on the back of the small fan. We need to use a screwdriver to unscrew the screw from the screw hole and save the screw.

2. Next, you can directly use your hands to force from the gap and separate the two sides. You will see the internal structure, with a small fan blade and a battery. It should be noted that there are wires connected inside. We can remove the blades and the circuit board first. Check again which parts have problems and repair them.