HP EliteBook 840 G3 - Manual (Page 20)

Buttons, speakers, and fingerprint reader (select models only)
Component Description
(1) Power button ● When the computer is off, press the button to turn on the
computer.
● When the computer is on, press the button briefly to initiate
Sleep.
● When the computer is in the Sleep state, press the button
briefly to exit Sleep.
● When the computer is in Hibernation, press the button
briefly to exit Hibernation.
CAUTION: Pressing and holding down the power button will
result in the loss of unsaved information.
If the computer has stopped responding and Windows® shutdown
procedures are ineffective, press and hold the power button for at
least 15 seconds to turn off the computer.
To learn more about your power settings: Select Start > Control
Panel > System and Security > Power Options.
(2) Speakers (2) Produce sound.
(3) Wireless button Turns the wireless feature on or off but does not establish a
wireless connection.
(4) Volume mute button Mutes and restores speaker sound.
(5) Fingerprint reader (select models only) Allows a fingerprint logon to Windows, instead of a password
logon.
10 Chapter 2 Getting to know your computer