jvsnype and ygjeff21, have you checked to see if the pistures also come up as blank or distorted (a sure sign of a CCD failure)? If the pictures are OK, then it might be that you accidentally hit the DISP button, or the camera has a loose LCD ribbon cable connector. The reason I would suspect either is that ygjeff mentioned that the LCD would spring to life when he played with the buttons on the back of the camera.
If and only if the camera still takes good pics, and the DISP button has been checked, then would next recommend reseating the LCD ribbon cable into its connector (ALSO ONLY IF THE CAMERA IS NO LONGER UNDER WARRANTY). The following link may be of some help. Wouldn't recommend going any farther than the first three pictures. You just want to jiggle or reseat the ribbon cable where the LCD connects to the circuit board, nothing else: