There may be several reasons for this:

1. Poor contact between the adapter power cord and the adapter socket triggers a fire, replace the wire, and clean the small metal pillar of the adapter socket.
2. The magnetic core of the switch transformer inside the adapter is loose, but it should not be dealt with. If you cannot bear it, open it and add resin to the switch transformer.                                                                                                                    The sound generated by current flow interference can be loud when some adapters are poorly shielded and do not affect their use.

3. It's not normal for the current adapter to have friction noise, after all, there is no device that produces sound, which may be current noise. There is a slight friction sound inside the computer, which is a normal phenomenon. After all, it requires continuous cooling and cannot be without sound.

   Power adapter is a power conversion device for small portable electronic devices and electronic appliances, widely used in devices such as telephone consoles, game consoles, language readers, walkthroughs, laptops, cellular phones, etc.

   Power adapters generally consist of a casing, power transformer, and rectifier circuit, and can be divided into AC output type and DC output type according to their output type; According to the connection method, it can be divided into wall mounted and desktop mounted.

    

   Power adapters are widely used in various fields such as industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instruments and meters, etc.

4.