have a macbook retina...as of two days ago my screen will go black (usually 1-2x a day...i'm on it 8 hours a day). But if i tilt my keyboard towards me...it brings the screen back up. talked to apple support and they told me a "switch" which decides if my lid is opened/closed is messed up. is there such a "switch"? how do i go about fixing it? just background info...i ended up buying a replacement bottom case because a rubber foot fell off and according to Apple for macbook retina's the rubber feet aren't replaceable beause they are built into the case. Apple wanted me to pay $35 for shipping, $199 for them to unscrew 8 screws and screw them back on, and I hung up while he put me on hold to see how much the bottom case part was. I ended up getting a case for $25 bucks on ebay, i was able to screw it on but it wouldn't sit flat on a desk and i found out the case wasn't right. But guess what? I was able to take a rubber foot off the new case and put it on my old case (fit's perfect) and i put my original case back on. But looks like I messed up this "switch"