Toshiba Satellite L40 - Manual (Page 87)

User’s Manual 6-11
Power and Power-Up Modes
System automatic Sleep/Hibernation
This feature automatically turns off the system in Sleep or Hibernation
mode if the computer is not used for a set duration.
Refer to
Special features , in Chapter 1, L40 Series Features for an
explanation of how to set the duration.
If the panel power off function is enabled and you use Shut down
Windows, do not close the display until the shut down function is
completed.