My Problem
My MacBook Air screen was black. Displaying but not lighting.
My Fix
The fuse near the display connector was intact so I checked the backlight driver and it was slightly liquid damage. I cleaned it with chemical product. It was looking perfect but still not working ... I reflowed it with flux to clean it even more, but was still not working so I finally fully replaced and the Mac is now working perfectly!!!
My Advice
It all from my experience. It s been few years now that I fixing and learning how to fix MacBook at a component level.
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