Dell 745 manual Removing the Computer Cover, Network controller is turned off in system setup

2	link integrity light	• Green — A good connection exists between a 10-Mbps network and the computer.
		• Orange — A good connection exists between a 100-Mbps network and the computer.
		• Yellow — A good connection exists between a 1000-Mbps (1-Gbps) network and the
		computer.
		• Off — The computer is not detecting a physical connection to the network or the
		network controller is turned off in system setup.
3	network adapter	To attach your computer to a network or broadband device, 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 light	The amber light flashes when the computer is transmitting or receiving network data. A
		high volume of network traffic may make this light appear to be in a steady "on" state.

5line-out connector

6line-in/ microphone connector

Use the green line-out connector to attach an amplified speaker set.

Use the blue and pink line-in/ microphone connector to attach a record/playback device such as a cassette player, CD player, or VCR.; or a personal computer microphone for voice or musical input into a sound or telephony program.

7USB connectors (5) Use the back USB connectors for devices that typically remain connected, such as printers and keyboards.

8	serial connector	Connect a serial device, such as a handheld device, to the serial connector.
9	video connector	If you have a DVI-compatible monitor, plug the cable from your monitor into the white
		connector on the back panel.
		If you have a VGA monitor, see "Connecting a VGA Monitor" in your computer User’s
		Guide.
10	power connector	The connector for the power adapter.
11	diagnostic lights	See "Diagnostic Lights" on page 50 for a description of light codes that can help you
		troubleshoot problems with your computer.

Removing the Computer Cover

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.

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Quick Reference Guide