Specifications

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Power Management Hot-keys
In addition to the programmable power management, you can use the power
management hot-keys to directly control the power consumption of your computer
with just a keystroke.
Fn
+
F11
Turns off the display on the built-in screen
Fn
+
F12
Puts the system into System Standby/Hibernation
Note that you can also reduce power consumption by decreasing
the screen brightness and decreasing the audio volume using the
brightness and volume hot-keys.