There is a strange ticking noise coming from underneath the keyboard of the laptop. It goes off every 4-5 seconds. I've been running my Macbook Pro like a slave since I first got it, trying to run games that the GPU can't seem to manage to run. Finally after 7 months it's shown a problem. Here's what it sounds like: http://www.youtube.com/watch?v=0gn2E6NuJHs Any suggestions? Could it be the HDD or a fan?