Sony VGN-SZ4MN/B User Manual page 22

Indicator
Scroll lock
Bluetooth technology
Wireless LAN
Functions
Press the Scr Lk key to change how you scroll the display. Normal scrolling resumes when the Scroll lock
indicator is off. The Scr Lk key functions differently depending on the program you are using and does not work
with all programs.
Illuminates when the WIRELESS switch is set to ON and Bluetooth technology is enabled.
Illuminates when the wireless LAN function is running.
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Getting Started