You can try to open the laptop up, just remove all the screws on the bottom. There is a small ribbon cable that connects to the mother board. Pull that cable out and reconnect it. If it wasn't a loose connection, it is either a bad lcd, or a bad mobo. Unfortunately, these are the most expensive items on a laptop. Try reconnecting, if it doesn't work, deal with the line or buy a new laptop.
Hope this helps
Mike, May 2007