I have a 13" macbook pro, bought late 2009, which has recently started making a whirring noise when tilted. I have a feeling it might be the hard drive scraping against its casing although I have no idea what the MBP hard drive design is like. I have applecare - is this something that I could get sorted out under that or is there some simple fix I can do myself? (maybe reset the accelerometer setting if this is the cause?) Thanks.