Dell 740 manual Connector

3	network adapter	To attach your computer to a network or broadband device,
	connector	connect one end of a network cable to either a network jack
		or your network or broadband device. Connect the other
		end of the network cable to the network adapter connector
		on the back panel of your computer. A click indicates that
		the network cable has been securely attached.
		NOTE: Do not plug a telephone cable into the network
		connector.
		On computers with a network connector card, use the
		connector on the card.
		It is recommended that you use Category 5 wiring and
		connectors for your network. If you must use Category 3
		wiring, force the network speed to 10 Mbps to ensure
		reliable operation.
4	network activity	Flashes a yellow light when the computer is transmitting or
	light	receiving network data. A high volume of network traffic
		may make this light appear to be in a steady "on" state.
5	line-out	Use the green line-out connector to attach headphones and
	connector	most speakers with integrated amplifiers.
		On computers with a sound card, use the connector on the
		card.
6	line-in connector	Use the line-in connector to attach a record/playback device
		such as a cassette player, CD player, or VCR.
		On computers with a sound card, use the connector on the
		card.
7	USB 2.0	Use the back USB connectors for devices that typically
	connectors (5)	remain connected, such as printers and keyboards.
8	video connector	Plug the cable from your VGA-compatible monitor into the
		blue connector.

NOTE: If you purchased an optional graphics card, this connector will be covered by a cap. Do not remove the cap. Connect your monitor to the connector on the graphics card.

NOTE: If you are using a graphics card that supports dual monitors, use the y-cable that came with your computer.

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Quick Reference Guide