MacBook screen really dim at 100% brightness
I have a MacBook that you can somewhat use with a flashlight no matter what way I tilt the brightness it just stays dim where I cant see it please help
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Try resetting PRAM; at startup press command+option+P+R until you hear a second boot chime then release. If that doesn’t help it might be you have a faulty keyboard or a faulty backlight circuit, but unfortunately there’s no way to tell exactly which of the two without some basic logic board testing.
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Most likely the CCFL's and/or the inverter are worn out
