Sony PCG-NVR23 - Manual (Page 48)

Hibernate mode
In the Hibernate mode, the state of the system is saved on the hard disk drive and power is turned off. The power indicator
is off in this mode.
To activate Hibernate mode
 Press the power button and release it immediately. The computer enters Hibernate mode.
Do not move the computer until its power indicator turns off.
If the computer does not activate Hibernate mode, see The power management does not respond. for more
information.
To return to Normal mode
 Press the power button to return to normal mode.
Page 48