So I got an used, but still in pretty good condition, MacBook and the top case has cracked near the trackpad and the left arrow key broke off. I checked the AppleCare status and the website says it's still good for over 2 years. I want to take it in but the one of the screws in the back of the case, right next to the hinge, is missing. Maybe the guy before me didn't know where to install the memory, I don't know? Would the Mac geniuses still take my laptop in for fixing or am I screwed?