Hmm, have you left it on for an extended period of time? Nothing comes up on the display at all? Have you tried pressing the F1 & F2 keys to adjust the brightness settings? Has the display came on at all ever since you're received it, or never at all? And also, when you turn it on, look and see if the screen looks like it flickers or initiates a backlight, or if it stays dead.
If you've tried all of the above and the screen still does nothing, you probably will need to call AppleCare & explain the problem. Hopefully it's just something simple like the brightness...and oh yeah, one other thing you can try. Try connecting it to an external monitor that's DVI or VGA (with included adapter) and see if anything shows up then. Good luck with it!
