Sony PCG-GRT250K - Manual (Page 99)

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 external display (monitor or TV), and both the
LCD and display.
Select one display (LCD or external display) 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 external display 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.
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