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MacBook backlight turns off when brightness is set at 100%

I was using my MacBook today when suddenly the backlight turned off, right while I was in the middle of using it. I know it was the backlight because: I have an external display, which remained on, ...
1
vote
1answer
3k views

MacBook pro (Early 2011) display backlight won't turn on automatically after waking up from sleep

My 15" Macbook Pro (Early 2011) has always had a problem where when I open the lid to wake it from sleeping the backlight doesn't turn on. I can easily turn it on by changing the brightness, which ...