My laptop lost all video...

Truth is, I don't even know where to start.
I've got an HP dv9000 series, running Vista Ultimate on a Centrino duo with an nvidia GeForce Go 7600.
I was trying out dreamscenes a month ago, but each time I closed, locked, hibernated, anything of that nature to my computer, it would then (after reopening, whatever) give me a "Display Driver _____ has stopped responding but has recovered successfully" message. Well, a couple days of that had me switching back to a normal background (couldn't find any cool, free dreamscene vids anyway), yet the problem continued to occur, however less frequently.

In the last couple of days, each time I locked or hibernated then shut my laptop, reopening it led to a blank black screen, though still "lit" and the computer still on. A power off and reboot was necessary to fix this, bringing up the "Computer failed to shut down properly, what do you want to do?" bit.
Last night, this occurred, but nothing I've done has gotten anything more than this dimly glowing black screen.
(Granted, I'm not super tech-savvy, but I learn things quick and know a little bit.)

I'm on my roommate's computer now, and I was wondering if anyone could help me out? Any ideas?

 

Can you see things on the screen, if you can, the backlight just may not be coming on. You should try hooking it to an external monitor and updating the driver, it may help.