Normal For Screen to Shut Off When Plug Is Taken Off?

[shuweiyu16]

Hi, I am just wondering if it is normal for my blackbook screen to go pitch black once my plug is pulled off.
I am just asking because sometimes my screen does not go pitch black but sometimes it does.
Thanks in advance.

 

[Zianac]

That isn't normal at all... but... next time when the screen goes pitch black try and use the keyboard to increase the backlighting to see if that fixes the problem...

 

[reh]

I suspect you had the screen brightness set pretty low when the Macbook was plugged into power. There's a setting in system preferences to reduce the brightness of the display when switching to battery power. Might try disabling that.

System Preferences -> Displays -> Options -> Settings for "Battery" -> uncheck "Reduce the brightness of the built-in display when using this power source"

 

[GoCubsGo]

Just to be certain, are you using this in clamshell mode? If not then go to the post just above mine.

 

[jdavtz]

This Macbook I'm writing on (and presumably all of them) remembers separate brightness levels for plugged-in-use and battery-powered-use. It sounds like yours when on battery power has remembered a minimal screen brightness setting. Unplug the power and use the F2 key to increase brightness. If that works, then that should automatically be remembered - try plugging in and unplugging again.