Sony PCG-GRT170 - Manual (Page 103)

Fn key combinations
Key combination Function
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 the or key.
To decrease volume, press the Fn+F4 keys and then press the or key.
Fn+F5 Adjusts the brightness of the computer screen (LCD).
To increase brightness, press the Fn+F5 keys and then press the or key.
To decrease brightness, press the Fn+F5 keys and then press the or key.
Fn+F7 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+F7 will not work. You cannot use the Fn+F7 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.
Page 103