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When I press the Fn and the F4 key it flashes a message about LCD screen. What does this key combination do? Thanks.
It is used for switching the way the screens are setup if you have an external screen attached.
Fn+ESC – Switches to sleep mode. To wake the computer up, press the Power button.
Fn+F2 – Shows the remaining battery charge (Easy Display Manager must be installed).
Fn+F3 – The Euro monetary symbol.
Fn+F4 – Switches the screen output to the LCD or external monitor.
Fn+F5 – Turns the LCD backlight on or off.
Fn+F6 – Mute on or off.
Fn+F7 – Samsung Magic Doctor.
Fn+F8 – Easy Speed Up Manager.
Fn+F9 – Turns the wireless LAN on or off.
Fn+F10 – Turns the touchpad on or off (useful if you have an external mouse).
Fn+F11 – Num Lock.
Fn+F12 – Scroll Lock.
Fn+Up Arrow/Down Arrow – Screen Brightness.
Fn+Left Arrow/Right Arrow – Volume control.
Thanks Billy Rubin. Very useful.
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