Sony VAIO VGN-N300 - Manual (Page 19)

19 n N
Getting Started
✍
To disconnect your computer completely from AC power, unplug the AC adapter.
Make sure that the AC outlet is easily accessible.
If you do not use your computer for a long period of time, place the computer into Hibernate mode. See Using Hibernate Mode (page 82) . This power
saving mode saves the time of shutting down or resuming.
The plug attachment can be detached and reattached with the plug turned upside down.