Contribution d'origine par : Robert Harless ,
There is a backlight driver chip on the board that is likely water damaged. When this becomes damaged on the older models, you could test by shining a light through the apple logo and you would see display. Since the newer models use metal for the logo on the lid, this is not a viable option. My first place to look would be around this chip for corrosion. If there is none, I would replace the display.