Here are some possible reasons and solutions. There may be many reasons why the laptop charger making beeping noise and cannot charge the laptop correctly. Because the power adapter will emit a sound with a fixed frequency when switching the power supply, because the rated power of the inductance coils of different frequencies is different, the sound of the induced current is also different.
It is normal for the computer adapter to make electrical noise. Now when I use it, why does my laptop adapter produce electric buzzing sound? Is something wrong with it? In this post, I will tell you how to solve laptop charger making noise yourself. I have a Dell Inspiron 6400 and have used it for many years.
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