Dell Latitude CPi A-Series User Manual page 88

When an external monitor is connected to the computer, the video image automatically appears on the
external monitor's screen when you boot your computer.
To toggle the video image between the built-in display, an external monitor, or both simultaneously, press
<FN><F8> on the built-in keyboard. Press <Scroll Lock><F8> on an external keyboard if the External Hot
Key option is enabled in the System Setup program.
If the external monitor is turned off when you boot your computer, the computer still sends the video image to
the external monitor. In this case, you will not see an image on either the computer's display or the external
monitor. To see an image, turn on the external monitor or switch the video image to the computer's display
by pressing <FN><F8> on the built-in keyboard or <Scroll Lock><F8> on an external keyboard if the
External Hot Key option is enabled in the System Setup program.
NOTE: If you are using your external monitor at a resolution greater than the display supports, the
simultaneous display feature is disabled. To use the display, switch to a resolution that the system
supports, or disconnect the external monitor and restart your computer.
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