Guys Help! My macbook pro 2.8 ghz 2011 13 inch (if you need to know) is rattling, and having this growling sound. Then after 5-10 minutes, the sound will resonate 5 times as loud combined with moaning. I want to take the 4 month old mbp to one of the stores, but i don't have the receipt. omg, plz do help, and i really appreciate any advice. Thanx for your time!