I just got a 15" macbook (Core 2 Duo) for around $100 on Ebay. I popped in a new disk drive, and a new hard drive, and the computer runs perfectly on OS X 10.6. The only problem, is that every time I set the computer's display back more than 90 deg. It falls back, and when I hold the laptop up on a 90 deg. angle it slams shut. The display also wiggles quite a bit without the hinges moving at all. Now, my macbook unibody has no problems with being held at 90 degrees, regardless of the beating it took from the previous owner. Anyway, I'm wondering if anyone has experience with replacing the hinges, and If you could tell me if it's a matter of tightening a screw, or if I need new hinges. I'd hate to tear apart the macbook again, find out I need new hinges, and then leave it in pieces until the part comes in.