Power Management; Shutting Down (Turning Off) The Computer; Setting Power Options; Using Power-Saving States - HP ProBook 450 G2 User Manual

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Power management

NOTE: A computer may have a power button or a power switch. The term power button is used throughout
this guide to mean both types of power controls.

Shutting down (turning off) the computer

CAUTION:
The shutdown command closes all open programs, including the operating system, and then turns off the
display and computer.
Shut down the computer under any of the following conditions:
●
When you need to replace the battery or access components inside the computer
●
When you are connecting an external hardware device that does not connect to a Universal Serial Bus
(USB) port
●
When the computer will be unused and disconnected from external power for an extended period
Although you can turn off the computer with the power button, the recommended procedure is to use the
Windows shutdown command:
NOTE: If the computer is in the Sleep state or in Hibernation, you must first exit Sleep or Hibernation before
shutdown is possible by briefly pressing the power button.
1. Save your work and close all open programs.
2. Select the Start button, select the Power icon, and then select Shut down.
If the computer is unresponsive and you are unable to use the preceding shutdown procedure, try the
following emergency procedures in the sequence provided:
●
Press ctrl+alt+delete. Select the Power icon, and then select Shut Down.
●
Press and hold the power button for at least 5 seconds.
●
Disconnect the computer from external power.
●
Remove the battery.

Setting power options

Using power-saving states

Sleep is enabled at the factory. When Sleep is initiated, the power lights blink and the screen clears. Your work
is saved to memory.
CAUTION:
functionality, or loss of information, do not initiate Sleep while reading from or writing to a disc or an external
memory card.
NOTE: You cannot initiate any type of networking connection or perform any computer functions while the
computer is in the Sleep state.
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Unsaved information is lost when the computer shuts down.
To reduce the risk of possible audio and video degradation, loss of audio or video playback