Sony VAIO VPCF12 Series - Manual (Page 29)

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Getting Started >
Using the Power Saving Modes
Using Sleep Mode
To activate Sleep mode
Click Start, the arrow next to the Shut down button, and Sleep.
To return to Normal mode
❑ Press any key.
❑ Press the power button on your computer.
!
If you press and hold the power button for more than four seconds, your computer will turn off automatically. You will lose all unsaved data.