Sony VAIO VPCW21 Series Operating Instructions - Hardware Manual page 33

Using Your VAIO Computer >
Using the Keyboard
Combination/Feature
Fn + (F12): hibernation
Function
Provides the lowest level of power consumption. When you execute this command, the states
of the system and the connected peripheral devices are saved to the built-in storage device and
the system power is turned off. To return the system to its original state, use the power switch
to turn on the power.
For details on power management, see Using the Power Saving Modes
n 33 N
(page 27).