Dell Inspiron 3800 - Manual (Page 7)

Power Conservation Key Combinations
Use the key combinations in Table 3 to activate or turn off the computer's power conservation features.
Table 3. Power Conservation Key Combinations
* This key combination does not function with ACPI if the settings have not been configured with the Power Management Properties window in
the Control Panel. See "
Power Conservation ."
Processing Speed Key Combinations
Use the key combinations in Table 4 to change the computer's processing speed.
Table 4. Processing Speed Key Combinations
Speaker Key Combinations
<Fn> + down
arrow Incrementally decreases brightness.
<Fn> + up arrow Incrementally increases brightness.
<Fn> + right arrow Decreases contrast, which has no effect on an active- matrix display.
<Fn> + left arrow Increases contrast, which has no effect on an active- matrix display.
<Fn><F5> Toggles the computer's display between regular video mode and reverse video mode (white on black). This key
combination works only if the computer is in text mode; it has no effect if the computer is running a graphical operating
system or application program.
<Fn><F7> Toggles the computer ’s display between expanded mode and regular video mode.
<Fn><F8> Switches the video image to the next display in the following sequence: the display, an external monitor, or both the display
and the monitor simultaneously. This key combination may not be supported under certain conditions.
1
<Fn><d> Turns off the display. This key combination may not be supported under certain conditions. 2
1
The extended desktop feature (the ability to simultaneously display video of the same content and resolution on both the
computer display screen and the external monitor) is not supported if the computer is booted to MS-DOS ®, using a full-screen
MS-DOS session under a Microsoft Windows operating system, or the ATI Mobility M1 video driver is not loaded. This
limitation may also be noted in operating systems other than Microsoft Windows.
2 Certain key combinations may not function with the Advanced Configuration and Power Interface (ACPI) or may require
configuration with the Power Management Properties window in the Control Panel. See "Power Conservation ."
NOTE: When using the integrated keyboard, you press <Fn> and the appropriate keys to perform certain functions (see
Table 3 ). To perform such functions on an external keyboard, you press <Scroll Lock> and the appropriate keys. You
must be sure that the External Hot Key option is enabled in the System Setup program.
Key Combinations Function
<Fn><d> Turns off the display*
<Fn><h> Turns off the hard-disk drive*
<Fn><Esc> Activates sleep or standby mode
<Fn><a> or
<Fn><q> on French keyboards Activates save-to-disk suspend (S2D) mode or hibernate mode(ACPI only)*
NOTE: When using the integrated keyboard, you press <Fn> and the appropriate keys to perform certain functions (see
Table 4 ). To perform such functions on an external keyboard, you press <Scroll Lock> and the appropriate keys. You
must be sure that the External Hot Key option is enabled in the System Setup program.
Key
Combinations
Function
<Fn><\> Switches between the microprocessor's maximum speed and a slower compatibility speed
<Ctrl><\> In full MS-DOS mode or in a full-screen DOS box, switches between the microprocessor ’s maximum speed and a slower
compatibility speed
NOTE: When using the integrated keyboard, you press <Fn> and the appropriate keys to perform certain functions (see
Table 5 ). To perform such functions on an external keyboard, you press <Scroll Lock> and the appropriate keys. You
must be sure that the External Hot Key option is enabled in the System Setup program.