When you say nothing on the screen, are you using an external monitor to view your info? If the machine boots and you can see your desktop on an external monitor but cannot use the laptop screen, it is not a driver issue - more likely the laptop display has an issue.
Disconnect the external monitor, reboot and try shining a flashlight at the screen. If you can see a very dim "desktop", that is an indication that the ccfl and/or inverter has gone bad. If you cannot see anything on the screen, but there is a dim glow at the bottom of the screen (without using flashlight), that is an indication that the lcd panel has died.
Replacement of the screen or inverter is not difficult, and there are several sources on the web for parts. I just replaced the screen/inverter on my 830 - cost me about $60 for a screen plus inverter off ebay. Took about 20 minutes.
Mark