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It sounds like a hard-disk error could be keeping your computer from starting normally.
This guide may help:
So I tried everything from that link and got as far Mac OSX Snow Leopard installer screen. The first few times I would click on Disk Utility in the upper tool bar, the computer would just stall. After a few times of shutting down and restarting while pressing "C", I finally made it to the Disk Utility box. But there's nothing in the box to click on. Is it possible it's not able to find my HD at all???
Also, when I try to safe boot and the white text has finished coming up on the screen, I am unable to type anything in.
Just to confirm, you are only trying to boot from your own computer's internal disk drive, not from a network, right?
If your hard drive is bad or going bad, it is possible that the your computer and Disk Utility will not recognize it at all.
There are advanced 'disk-doctor' programs that might be able to fix the problem, but I've never used any of them to fix an OS X drive, so I can't recommend one. And there is no guarantee any disk program can fix the hard drive problem, or that a failing hard drive will 'stay fixed'.
It is often better just to get a new hard drive...