2Key CombinationsNOTEz Do not repeatedly press the keys in quick succession.z Do not use the key combinations together with touch pad (external mouse) or other key operations.z Do not use the key combinations before you log on to Windows. Wait until the hard disk drive indicator turns off.On the Setup Utility screen, you can use the key combinations of Fn+F1, Fn+F2 and Fn+F3. By using the key com-binations of Fn+F3, the display is switched between the internal LCD, simultaneous display *1 and the external dis-play.z The key combinations may not work with some applications.z The popup menu icon appears after logging on to Windows. It may not appear in some application conditions (e.g.,when [Command Prompt] is set to “Full Screen”).*1 Only for model with Mobile Intel ® PM965 Express ChipsetsKey Function Popup menu iconFn+F1Fn+F2LCD brightness(Fn+F1= down / Fn+F2= up)Fn+F3 Display switching (Î page 45)(When an external display is connected)Internal LCD Simultaneous display External displayCAUTIONz Do not press any keys until the display has finished switching.z Do not use this function:• When an external display is not connected.• When playing motion video such as DVD or MPEG.• When using the Extended Desktop.• When showing a game screen such as pinball.Fn+F4 Speaker on/offNOTEz Beeps do not sound if you turn off the speaker sound.OFF(MUTE)ON