Turn off display

11-30  Source: Network gathering  Views:0 

How do I turn off the main display when using external monitor or tv, or can you?
The way to turn the display off is by closing the lid on the MB. Here is a link to an Apple article on the topic:
Notice the article mentions using an external keyboard or mouse. But that isn't absolutely necessary. For example, I often close the lid and then wake up the computer using a USB flash memory device. Then I can open the lid and use the built-in keyboard and trackpad and the internal display remains off.
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