fan noise has gotten really bad in the past day or so and am looking for a good place online to buy a replacement. Does it have one fan inside or two? I'm only hearing fan noise from the left side. Just wondering if there's one on the right thats crapped out completely and i'll need to swap them both out while I've got it cracked open. Don't have applecare but went to the store to see what they would say and they wanted to keep it and run a 24 hr software test. Seems stupid when you can hear the ball bearing just grinding away.