Removing the computer cover – Dell OptiPlex 745 User Manual

Page 24

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24

Quick Reference Guide

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.

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.

5

line-out connector

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

6

line-in/ microphone
connector

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.

7

USB 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.

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