Compaq Presario R3000 backlight problem

Question

Hello

I have a 3 year old Compaq Presario R3000. Since last 3 days, it's having
an issue with the display. The screen always stay black and the back light never
comes on but I can still make out an image on the LCD. It’s dark, but the image
is still there.

The laptop is booting properly and I can hear the Windows
Startup sound and hardly see the images and my desktop imagePlease let me know what could have gone wrong with this and it would be great if you can let me know when I can purchase the parts reqd.RegardsArjun