Have you replaced any of the bulbs or fuses?If you still have the box the lights came in, check to see the wattage of the bulbs it takes. Assuming you are talking about mini-lights, you can't mix wattages. Some take the 2.5 - 3.5 watt bulbs, and others take 6 watt bulbs.
What is wrong with it exactly? Not turning on at all? You would probably have to replace the logic board and possible the cables, camera, etc depending whether or not they have been damaged also.