W520 - Slight Buzzing Noise, Louder when Scrolling

Hello,
I have a W520 (4270CTO model I believe), i7 2760QM, Quadro 1000M, which arrived around a week and a few days ago.
I am encountering a slight issue, in which there is a slight buzz with the machine on, and it gets a little louder when I am scrolling. It occurs both with AC plugged in, and AC unplugged (running off battery), but I think it is louder on battery than when plugged in.
Searching around I found this thread: http://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/W520-Fainth-low-tone-beeps/td-p/554213/page/2
Which has the following post:
I am having this issue also. For my case, it is the AC port (yellow) that causes the whine, it is near to your CPU / GPU. The low tone beep could be the current buzzing through it. It is even louder when you are moving up and down the scroll bar. Maybe a board replacement or the AC port replacement could resolve your problems. You could contact and suggest it to Lenovo Support.
This seems like it is exactly my case. Having said that I have a few questions (I am in Canada, an Individual)
1. Is this an "issue"? Will the problem get any worse?
2. This is my first purchase with Lenovo, how would I service this product under my warranty?
3. Can I do it locally? I know there are "service" places, do I just find a place that is listed on Lenovos Service Provider list, tell them the issue and they'll fix it? Does it cost anything?
Basically, I would like to know if the issue is truly an issue, and if so, how I would go ahead and service it.
Thanks,
Sam

Hi all
From what I know, it's either the system board (AC port) or voltage regulator (Intel CPU Chip) is buzzing.
If it's AC Port, you can just hear it when you place your ears near AC port. You could probably get a system board replaced. Sometimes when a power adapter is connected, you could even hear power adapter buzzing.
If it's Intel CPU chip, probably there's not much you could do. It is affected since the 1st gen of Intel Core i processors and known as manufacturing defect. Therefore, it is considered normal (throughout different OEM). If it buzzes too loud, a workaround is to disable CPU Power Management, drawback is having shorter battery life. Maybe you could try and see whether any thermal compound leak out of it's contact? 
Cheers 
Peter
ThinkPad: W520 (4284-A99)
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