Hey everyone!

So i got my G551JM back in June, and recently it had started to make a clicking sound, like a little clock, about 1 every second. It sounds similar to a mouse being scrolled fast, but shorter. I can barely hear it, but when I'm skyping it gets really loud and annoying for other people in the call, because of the built in microphone. I ran multiple hdd checks and everything seems to be fine there.
It's getting really annoying, any suggestions what might cause this?
Thanks for the help in advance.