Hey guys, I know there have been several threads on this type of thing already, but I haven't found anyone with my situation. I did a serial number look up and it came back with two macbook pro models, here's a link: http://support.apple.com/kb/SP32 I can't go to "about this mac" because I wiped my hard drive and lost my OS cd s so I can't reinstall it (the screen flashes the folder with a question mark"). So, two questions, how do I tell which MBP I have from the link above? I took out the hard drive and it's a 100gb, so I'm assuming its the second one (model MA601LL) but how do I make sure? I need a new inverter for it and want to get the right inverter. Also, since I lost the OS cd, is there a way I can get a replacement from apple free (I doubt it, but does anyone know if you can)? tiger, leopard or snow leopard, I don't care. Preferably snow leopard because that's what I had on it, but I need a new OS regardless, so I don't care what apple gives me (if they will give me anything) lol.