I have noticed a buzzing noise coming from the big white square in the middle of my power cord(I have the extension plugged into my power-cord so it might be the part that connects to the wall for you). If I put the square white box thing to my ear it makes a pretty noticeable buzzing noise and I just want to see if you guys hear the same thing in yours. I dont want to burn down my house because my power adapter is shorted out,lol. Thanks for your replies.