Hi all I have the strangest issue. I just bought a brand new rMBP last weekend after saving for months and months and I am experiencing a very strange noise. I have a weird ticking/clicking noise that seems to occur when I use the trackpad or type on the keys. It almost sounds like a cricket chirping and it's very faint. It's not loud, but it's definitely driving me insane and after spending this much money, it annoys me quite a bit. After doing some investigative work , I have figured out that this problem only occurs whenever the power supply is plugged into the laptop, charging the battery. I did some google searching and can't seem to find anything on this issue. Has anybody heard of this or know why it's happening? Perhaps I can do something at home to fix this or maybe I need to exchange it? Kinda bums me out to do an exchange seeing as I got a Samsung screen! Gah! Any advice would be appreciated. Thanks!