Sony VGN-BX500 - Manual (Page 129)

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Customizing Your VAIO Computer
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If you do not use the AC adapter for a long period of time, put the computer into Hibernate mode. This power saving mode saves you the time of shutting
down in the normal way.
When the computer is in Hibernate mode, you cannot insert a disc.
Hibernate mode requires more time than Standby mode to be activated.
It takes more time to return to Normal mode from Hibernate mode than from Standby mode.
Hibernate mode uses less power than Standby mode.
!
Do not move the computer until its power indicator turns off.