Gateway UC78 Reference Manual page 55

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2 If you are using the VGA port, connect one end
of the VGA cable to the monitor, projector, or
television.
-OR-
If you are using the HDMI port, connect one end
of the HDMI cable to the monitor, projector, or
television.
3 Plug the other end of the VGA cable into the
monitor port
-OR-
Plug the other end of the HDMI cable into the
optional HDMI port on your notebook.
4 Turn on your notebook.
on your notebook.
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