HP Compaq 435 Notebook PC - Manual (Page 15)

Buttons
Component Description
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
Suspend.
● When the computer is in the Suspend state, press the button
briefly to exit Suspend.
● When the computer is in Hibernation, press the button briefly to
exit Hibernation.
If the computer has stopped responding and operating system
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 Computer >
Control Center > Power Management.
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