i installed a 750gb hard drive last night as well as 8gb ram and now my computer doesn't want to boot up, even with the install DVD (original one). With the new hard drive i get the folder question mark thing. So i put in my install DVD that came with my macbook and it freezes on the apple logo with the spinning wheel stopping. I left it on even for 30 minutes thinking it will eventually boot but it never did. So i switched my hard drive to my existing one and same thing, freezing during apple logo. NOTHING SEEMS TO BE WORKING. HELP. Also, for some reason my bootcamp partition working.