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My macbook pro was running really slow, so I restarted the computer. Now it wont start up at all, I get the flashing file with a question mark. I also tried a bunch of the boot options like holding down "option" while booting, etc. All I get is a mouse cursor on a plain white screen. I don't have anything plugged in to the computer so that's not the problem.

Does this mean I have a corrupted hard drive? Would there be a way to save the data on the hard drive? I'm not sure what OS it has and I don't know how to look it up without it actually booting up.

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Try booting the system up with the recovery cd. See what happens. – enginefree Jan 17 '13 at 2:27
It's important to list the startup key combinations you've tried--that will help narrow down what might be going wrong. – Zo219 Jan 17 '13 at 7:18

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