HP 640 ProBook G3 Notebook PC & HP 650 ProBook G3 Notebook PC - Maintenance and Service Guide

Using the hot keys
To use a hot key:
▲
Press the fn key, and then press one of the keys listed in the following table.
Press fn+function key Description
Initiates Sleep, which saves your information in system memory. The display and other system components
turn o and power is conserved. To exit Sleep, briey press the power button.
CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.
Turns the keyboard backlight o or on.
NOTE: To conserve battery power, turn o this feature.
Switches the screen image between display devices connected to the system. For example, if a monitor is
connected to the computer, repeatedly pressing this key alternates the screen image from the computer
display to the monitor display to a simultaneous display on both the computer and the monitor.
Decreases the screen brightness incrementally as long as you hold down the key.
Increases the screen brightness incrementally as long as you hold down the key.
Decreases speaker volume incrementally while you hold down the key.
Increases speaker volume incrementally while you hold down the key.
Mutes the microphone.
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