Okay, so I JUST got my MBP today (Late 2011). and first thing I did was install 8GB of Corsair ram. I ran my computer fine. I Got from UPS, and installed, all in about 45min (after doing first boot up). I installed Mountain Lion a few hours later, and everything was fine. I was installing WOW & Steam and all of a sudden the 3 beep alarm went off. I looked at my screen and part of it was pixelated, and my computer froze. Both ram sticks are in securely, for this isn't my first time installing ram, and I've shut off, Rebooted since then and never got beeps. Should I be worried? I don't really wanna unscrew the 11 screws again. but I noticed, when I took the back off, I had to Pop it off, like a cell phone back, but when I put it back on, it didn't snap back on, it just sat there and i screwed everything back together help?