Sony PCG-GRV680P Manual

Fn+F3 

Toggles the built-in speakers off and on. 

Fn+F4  Adjusts the built-in speaker volume. An on-screen display appears notifying you when a change occurs. 

To increase volume, press the Fn+F4 keys and then press 

or 

. 

To decrease volume, press the Fn+F4 keys and then press 

or 

. 

Fn+F5  Adjusts the brightness of the computer screen (LCD). 

To increase brightness, press the Fn+F5 keys and then press 

or 

. 

To decrease brightness, press the Fn+F5 keys and then press 

or 

. 

Fn+F7  Toggles the display between the computer screen (LCD), a connected external device, such as a monitor or
projector, and both the LCD and external device. 

Select one display at a time when playing a DVD. Connect the cable before you turn on the computer; otherwise, Fn+F7 will
not work. 
Fn+F8  Toggles the display between the computer screen (LCD), a connected TV, and both the LCD and TV. 

Select one display (LCD or TV) when playing a DVD. Connect the TV cable before you turn on the computer; otherwise,
Fn+F8 will not work. You cannot use the Fn+F8 function to switch between LCD and TV once a DVD is inserted into the
optical drive. 
Fn+F12 

Puts the system into Hibernate mode, a power management state. To return the system to normal

operating mode, press the power button. Hibernate mode consumes the lowest level of power. 
Fn+Esc 

Puts the system into Standby mode, a power management state. To return the system to the active state,

press any key or the power button.