I have a toshiba Satellite M55 s3291

I have no experience with this stuff. But when i turn the machine on I never get to windows.
The machine starts and the start up DOS like screen shows, Then the screen goes black.

I can hit F2 or F12 to get to bios screen. So the screen does work, in color. I am guessing that maybe the windows OS has been corrupted.
But I have no idea what to do next.

Hello, anyone?

Bump

reseat/ replace your hard disk.

Is that just a blanket statement or do you really think the harddrive is shot?