I have an Alienware x17 R1. I believe it is the main cooling fan on the right side is failing it does the dreaded growl of death every few seconds as it tries to spin up. Watched a vid on YouTube and the guy there said it was built in part of the heat sink. Is this self replaceable or does it need to be sent to Dell for service? Or other service center? It is out of warranty.  What are the thoughts of the Guru's?