HP DM4 - Manual (Page 15)

Buttons
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.
If the computer has stopped responding and Windows®
shutdown procedures are ineffective, press and hold the
power button for at least 5 seconds to turn off the computer.
To learn more about your power settings, select Start >
Control Panel > System and Security > Power Options,
or refer to the HP Notebook Reference Guide.
(2) Fingerprint reader Allows a fingerprint logon to Windows, instead of a
password logon.
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