For about a week ago my MacBook Pro first started doing it, it began freezing very often and there was nothing to do other than rebooting it. So I decided to do a clean install of Snow Leopard, because maybe that would work, so I started my Mac from the Snow Leopard install disk, partioned my harddrive and installed Snow Leopard, I then rebooted. But when it turned on again all I was met with was a totally black screen, no chime or anything, just a black screen. I rebooted it again and got to the setup assistent. But whenever I got to the migration and clicked to not import anything, it froze. I tried it several times, sometimes it wouldn't even start up, just a black screen with no chime. Then finally today it didn't freeze, and I created my account. But now it said there was no AirPort card installed. So I rebooted it, and was and till now have been met with constantly freezing when booting, sometimes the Grey logo appears, but with the spinning thing frozen, and other times it just shows a black screen with no chime. So I don't really know what to do. Any help is really appreciated!