Panasonic CF-18 Series Reference Manual page 6

Key Combinations
Key
Fn+F4
Speaker on/off switch
Pressing this key combination turns on/off audio
from the internal speaker and headphone jack.
NOTE
Disabling the speakers will also disable the
warning beep.
Speakers connected to the USB port
cannot be muted.
Fn+F5
Volume control (down)
Volume control (up)
Fn+F6
Pressing this key combination adjusts the volume
of the internal speaker and headphone jack.
NOTE
This key combination cannot be used to
adjust the volume of the warning beep or
speakers connected to the USB port.
Fn+F7
Power off using the standby function
Pressing this key combination causes the current
status of the computer to be saved to the memory,
and powers off the computer. (
Functions
page 36)
6
Popup Window
(Displayed after logging
on to Windows)
OFF
(MUTE)
ON