I’m hoping for the best here for you. First, if your laptop has an external port (usually VGA), try using that to use an external monitor. If that doesn’t work, then it’s almost certain the graphics port (or card if you have one in there) is completely shot. If you can use the external port, though, then it sounds like the ribbon cable for the LCD screen is disconnected, which I’ve seen happen a bit in laptops. Although I’m not sure how to fix this one specifically, Googling around how to reconnect the display ribbon in your specific model should yield something.
I did some looking around and found this: http://www.fonerbooks.com/laptop_6.htm