Sony VGN-SR490DDB - Manual (Page 128)

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Customizing Your VAIO Computer >
Using the Power Saving Modes
To return to Normal mode
Press the power button.
The computer returns to its normal state.
!
If you press and hold the power button for more than four seconds, your computer will turn off automatically.
✍
It takes more time to return to Normal mode from Hibernate mode than from Sleep mode.