Sony VAIO PCG-SR1K User Manual page 30

Using Your Notebook Computer
Using the Keyboard
Combinations/ Functions
Feature
Fn+B Toggles the Bass Boost function off and on. This feature is available
Bass Boost with headphones only.
Fn+D Darkens the LCD in order to save power.
Video standby
Fn+F Zooms the display size in or out when the display is set to a low
Change Display resolution.
size
Fn+S Puts the system into Idle mode, a power management state. To
System Idle return to the active state, press any key.
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