The AC three-hole plug of the notebook computer was burnt black.

Hello, is it the reason that the AC three-hole plug of the notebook computer is burnt black? The reason why the AC three-hole plug of notebook computer is burnt black is that

1, the blackening of electrical interface is generally caused by arc, too small incomplete contact area with plug-in and too concentrated current during operation.

2. Use it after the high temperature at the moment of arc initiation leads to the formation of oxide layer on the metal surface. It is easy to produce poor contact. Improper blockage will slowly heat up and melt and burn black after heat accumulation. Due to the high temperature, the internal deformation contact situation is further deteriorated, and continued use is likely to cause electrical damage.