What kind of lights are being used for the backlight?
Could be LED, small incandescents, or even EL.
Are you looking for regulators on the 'part' or the power supply board?
Pictures can help too
Yes, an image of the LCD would be nice. It seems to me a common 16x2, so leds could be inside it, in any case, you should check well by eye, as said from gryd3, wiring connections to it, and if led supply power is a nice DC.