1
vote
0answers
2k views

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, ...
5
votes
1answer
478 views

Does using a brightness reducing app save battery?

I installed the app Brightness Slider on my MacBook because the lowest brightness setting in the System Prefs isn't low enough at times. When I choose a brightness setting below what the System Prefs ...
3
votes
1answer
576 views

Why does my MacBook's monitor go to maximum brightness when waking up from sleep?

I have my MacBook connected to an external monitor (via HDMI), and the brightness of MacBook monitor is set to 50% of max brightness . I usually put my display to sleep when I leave my computer for a ...
0
votes
1answer
558 views

Screen flickers, stops after brightness change

Whenever I am using my 2006 Macbook for a while, the screen starts flickering, from one shade of brightness to another. When I change the brightness, it stops. It also occurs right after startup or ...
2
votes
2answers
1k views

MacBook brightness set to zero suddenly resets itself to one. Any ideas why?

Every night I start some music/audiobook/whatever in iTunes and then reduce the brightness of the screen to zero to listen to the audio without seeing a bright screen. For the past few weeks (I ...