Sony VGN-AR170GU1 - Manual (Page 22)

22 n N
Getting Started
✍
To disconnect the computer completely from AC power, unplug the AC adapter.
Make sure that the AC outlet is easily accessible.
If you do not use the computer for a long period of time, put the computer into Hibernate mode. See Using Hibernate Mode (page 128) . This power
saving mode saves the time of shutting down or resuming.