Dropped a 15'' mbp from about 6'' inches to the ground. Didn't see how it hit or what actually happened with it. Now when I close the laptop, it has a very slight overbite - basically the top / lcd portion hangs over the edge of the bottom by a very small amount. Not sure how to correct the 'overhang' / 'overbite'. What contact points should I be looking at or pressing on / fiddling with.