1、 What to do if there is a problem of faulty soldering in the circuit

It is necessary to carefully check whether there is faulty soldering on the solder joints on the circuit board, and repair welding in time; Check whether the electronic components are burnt out and replace them in time; Or replace the faulty circuit board directly.

2、 What to do when there is dirt or water entering the tap switch

It is only necessary to remove the corresponding equipment shell and check whether the water entering the lower touch switch is serious. If it is not serious, use desiccant to absorb the water. If it is a stain, wipe it with alcohol, and then install it after the alcohol volatilizes. Do not damage the equipment twice. If the water ingress is serious, it is recommended to replace the touch switch with a new one with the same specification, model and function.