Dell P51G Owner's Manual page 44

Option
Audio
Keyboard Illumination
Keyboard Backlight with AC
Unobtrusive Mode
Miscellaneous Devices
Table 4. Video
Option
LCD Brightness
NOTE: The Video setting will only be visible when a video card is installed into the system.
44
Description
NOTE: USB keyboard and mouse always work in the BIOS setup
irrespective of these settings.
This field enables or disables the integrated audio controller. By default,
the Enable Audio option is selected.
This field lets you choose the operating mode of the keyboard
illumination feature.
The keyboard brightness level can be set from 0% to 100%
• Disabled
• Dim
• Bright
This option is disabled by default.
The Keyboard Backlight with AC option does not affect the main
keyboard illumination feature. Keyboard Illumination will continue to
support the various illumination levels. This field has an effect when the
backlight is enabled.
• Keyboard Backlight with AC
This option is disabled by default.
This option, when enabled, pressing Fn+F7 turns off all light and sound
emissions in the system. To resume normal operation, press Fn+F7
again. This option is disabled by default.
Allows you to enable or disable the following devices:
• Enable Microphone
• Enable Camera
• Enable Media Card
• Disable Media Card
NOTE: All devices are enabled by default.
You can also enable or disable Media Card.
Description
Allows you to set the display brightness depending up on the power
source (On Battery and On AC).