Probably a cable break of the display?

Your inverter cable is broken internally. You need to replace it. Instructions for replacement are in this guide. There are 2 different inverter cables for the A1181 MacBook one is referred to as 4 walls the other as 3 walls. Here is a video that does a good job of explaining the difference between the 3 walls & 4 walls. I would use part of the fore mentioned guide to remove the upper case/keyboard to get a visual as to which cable is used in your MacBook. I would buy a new one if possible. If you buy a used one, buy from a reputable seller that puts a warranty on the part. Here is a google search to help you find your part.