Hi, My 13-inch, Early 2011 MacBook Pro screen/hinge has started making a strange noise randomly when I either open or close the screen, or change its angle. It doesn't happen _all_ the time, but enough for me to notice it. Its not a 'clicking' noise, more like a grinding noise. Could it be a misaligned screen/hinge? Would Apple be able to repair it, either by replacing the screen or realigning it? (I have extra AppleCare etc). Thanks.