I've went into BIOS and tested the brightness setting. When I set it all the way to 8 (Max), the computer made a noise and the backlight turned off.
I experimented with that and I was able to make the backlight stay on for at least a 2-3 minutes. When I try to boot up the computer, the backlight stays on until the 'Loading' screen appears. The thing is that I can still see the screen, but it's hard to clearly see it because the backlight is off.
She is running Windows Vista if that has anything to do with it.
Also, I don't currently have an external monitor with me right now, though I'm planning on trying to get one soon.
Thanks in advance.