Can't even get into your bios ?? what you mean is there no power even going into it ??
Can you hear fans going?
Any response from the monitor?
Any thing come on the screen at all?
What were you doin before it screwed up? (e.g: You were surfing net and you recieved a Blue screen, then installed an updated driver, and waited for the restart and it never did ??)
If you can answer the above questions we might get a better idea of whats happening.