1.Press the <Fn+F4> key combination until only the LCD is displaying the computer output.
2.Disconnect the external monitor or television from the connection on the back of your computer.
Using Powerplay
The Powerplay technology supplied with your graphics adapter to extend battery life.
POWERPLAY Use Limitations
Activating POWERPLAY will reduce your graphic card performance.
To activate POWERPLAY proceed as follows:1.Click Start > Control Panel > Appearance and Themes.
2.Click 
icon. The Display Properties window appears.
3.Click the Settings tab. The Settings screen appears.
4.Click the Advanced button. The (Multiple Monitors) and M7 Properties window appears.
5.Click the POWERPLAY tab
6.Click the 
POWERPLAY button in the POWERPLAY Settings section. The button will change to a 
button and activate the other options available.
Using Dual View Mode 67