System Auto Off; Panel Power On/Off - Toshiba Satellite L555D-S7005 User Manual

Hot keys
You can use the FN + F3 hot key to enter Sleep Mode or FN + F4 to enter
Hibernation Mode - please refer to Chapter 5,
details.

Panel power on/off

You can set up your computer so that power is turned off automatically
when you close the display panel, and turned on again when you open it.
Please note that this function is only available for Sleep Mode or
Hibernation Mode, not for Shut Down Mode.
If the panel power off function is enabled and you manually shut down
Windows, do not close the computer's display panel until the shut down
process has been completed.

System auto off

This feature turns the system off automatically if it is not used for a set
duration. The system shuts down in sleep mode or hibernation mode.
User's Manual
L550/L555/L550D/L555D
The Keyboard for further
6-13