The chip on the circuit board can be removed in the following ways:
1, if you use an ordinary soldering iron, first wait for the iron to become hot, and then quickly spot the solder. It should be fast, otherwise this one will be cold and that one will be hot, and it won't be removed. On the other side, gently shake with tweezers to see if it's loose. This method is difficult to master. It takes practice.
2, Use a heat gun to adjust it to about 350° and blow into the IC pin until the solder on the pin dissolves. Remove the IC by gently shaking it with tweezers.