Notes On Power Saving Modes - Sony PCGA-UMS1 Primary User Manual

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To activate Hibernate mode
1 To activate Hibernate mode, press the key combination Fn+F12, or press the
power button and release it immediately. The "Save to Disk Manager"
screen appears and the notebook enters Hibernate mode.
Do not move the notebook until its power indicator turns off.
2 Press on the power button to return to normal mode.

Notes on power saving modes

When returning from Hibernate mode, the system status stored on the hard
disk is erased and the notebook starts normally if you press the power button
and hold it for more than four seconds.
Standby uses more power than Hibernate.
Standby requires less time than Hibernate to return to normal mode.
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