Hardware :: LCD On Aluminum Macbook Unibody

I recently got a new lcd for my macbook unibody, started putting it in, connected the lvds connector and the screen lit up fine. After i finished putting the computer back together and after a restart, i noticed that the backlight had gone out, but the screen was still working. I checked both sides of the lvds cord to see if they were connected right, with no luck. So I tested the old lcd, and i found that the backlight was not working on the old lcd screen either... Im hoping someone could tell me what its likely to be? Its out of warranty, so im out of luck there...