HP Compaq Presario C542EA Notebook PC - Manual (Page 10)

Buttons and switches
Component Description
(1) Wireless button* Turns the wireless functionality on or off, but does not create a
wireless connection.
NOTE To establish a wireless connection, a wireless
network must already be set up.
(2) Power button* When the computer is off, press the power button to turn on the
computer.
If the computer has stopped responding and Windows shutdown
procedures cannot be used, 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 Maintenance > Power Options.
(3) Volume down button Decreases system volume.
(4) Volume up button Increases system volume.
(5) Volume mute button Mutes system sound.
*This table describes default settings.
4 Chapter 1 Notebook Tour ENWW