HP ProBook 4326s Notebook-PC - Manual (Page 52)

Displaying system information
Press fn+esc to display information about system hardware components and the system BIOS version
number.
In the Windows fn+esc display, the version of the system BIOS (basic input-output system) is displayed
as the BIOS date. On some computer models, the BIOS date is displayed in decimal format. The BIOS
date is sometimes called the system ROM version number.
Initiating Sleep
CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.
Press fn+f1 to initiate Sleep.
When Sleep is initiated, your information is stored in system memory, the screen is cleared, and power
is conserved. While the computer is in the Sleep state, the power lights blink. The computer must be on
before you can initiate Sleep.
NOTE: If a critical battery level occurs while the computer is in the Sleep state, the computer initiates
Hibernation and the information stored in memory is saved to the hard drive. The factory setting for
critical battery action is Hibernate, but this setting can be changed using Power Options in Windows
Control Panel.
To exit Sleep, briefly press the power button.
The function of the fn+f1 hotkey can be changed. For example, you can set the fn+f1 hotkey to initiate
Hibernation instead of Sleep.
NOTE: In all Windows operating system windows, references to the sleep button apply to the fn+f1
hotkey.
Decreasing screen brightness
Press fn+f2 to decrease screen brightness. Hold down the hotkey to decrease the brightness level
incrementally.
Increasing screen brightness
Press fn+f3 to increase screen brightness. Hold down the hotkey to increase the brightness level
incrementally.
Switching the screen image
Press fn+f4 to switch the screen image among display devices connected to the system. For example,
if a monitor is connected to the computer, pressing fn+f4 alternates the screen image from computer
display to monitor display to simultaneous display on both the computer and the monitor.
Most external monitors receive video information from the computer using the external VGA video
standard. The
fn+f4 hotkey can also alternate images among other devices receiving video information
from the computer.
The following video transmission types, with examples of devices that use them, are supported by the
fn+f4 hotkey:
● LCD (computer display)
● External VGA (most external monitors)
40 Chapter 3 Pointing devices and keyboard