Chosen Solution
I’m have the same issuse a lot of people are having with the older macbook now. screen goes black. you can still see image slightly and pushing the display brightness buttons do nothing. if i close the lid almost all the way the screen comes back, but if i open it all the way again in goes black again(sometimes) other times it works just fine. using an external display works fine too. does anyone now what exactly is going on? inverter cable, inverter, or something else?
First hook it up to an external monitor. The fact that it comes on when closing the lid indicates a severed inverter cable. I would not get a used cable to repair this, get a new one, otherwise your problem may return quickly. It’s Apple part number 922-7612 http://www.welovemacs.com/9227612.html
I have this same problem. I watched this video and this guy has seemed to have solved it! https://www.youtube.com/watch?v=wh6jYrHh…