Brick power for W520 buzzing for the use

Hi all

So I use a Lenovo W520 bought in the States during his studies in Berlin. I just got here, and though my converter/adapter handles the change of 230 (or 220: Berlin...) to 110, and the brick said it works with 100-240, my power brick cable bubbles. It heats more than usual and the only side effect is the buzz, but it scares me a little.

It doesn't seem to be any mention of the buzz and most of the things I found tend to show that things are well with laptops lenovo if you use a converter, but I want to just make sure. Any help would be greatly appreciated.

Thank you.

Plug the power supply directly to the wall socket (get the adapter for the Germany). The hum occurs because your 220/110 converter which does not sinusoidal signal.

Tags: ThinkPad Notebooks

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