HP ProBook 4525s HP ProBook Notebook PC User Guide - Windows Vista - Page 52

Displaying system information, Initiating Sleep, Decreasing screen brightness

Page 52 highlights

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

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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