Sony VGC-JS320J - Manual (Page 19)

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Getting Started >
Setting Up Your Computer
!
The shape of the DC In plug varies depending on the AC adapter.
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To disconnect your computer completely from AC power, unplug the AC adapter when the computer is off.
Make sure that the AC outlets are easily accessible.
!
If you unplug the AC adapter from your computer while the computer is on or in Sleep mode, you may lose all unsaved data.