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Turning On Your Computer
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If necessary, adjust the brightness controls for the LCD display as follows:
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Your computer is equipped with a Brightness button, located next to the Power button. Pressing it will adjust the LCD screen brightness. To increase brightness, press the Fn+F5 keys, and then press the Up Arrow key or Right Arrow key . To decrease brightness, press the Fn+F5 keys, and then press the Down Arrow key or Left Arrow key .