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(You will have to redo your various custom settings again, though.)
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By "zapping" the PRAM settings, all of these various settings are wiped clean, and if one of them is the source of the sleep mode kicking in unexpectedly, then your screen black out issue will be solved.
#HOW TO TURN ON MACBOOK AIR WHEN SCREEN BLACKS OUT SERIES#
What this does is delete a series of settings that are kept in "PRAM" (Parameter RAM) which include customizations a user has made, for example mouse movement speed, volume on speakers, etc. "Zapping the PRAM" has been the all purpose shock therapy for Apple McIntoshes for decades.
![how to turn on macbook air when screen blacks out how to turn on macbook air when screen blacks out](http://s3.amazonaws.com/photography.prod.demandstudios.com/4527dcb0-6568-4a78-a31d-f32d17ce51f0.png)
Reboot your machine to return to your usual system operation.