Dell 5100 58 , NOTE:

58 Removing and Installing Parts
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1 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.
• Off — The computer is not detecting a physical connection to the network.
2 network adapter
connector
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.
3 network activity light Flashes a yellow light 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.
4 surround connector Use the black surround connector to attach multichannel-capable speakers.
5 line-in connector Use the blue 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.
6 line-out connector Use the green line-out connector (available on computers with integrated sound) to
attach headphones and most speakers with integrated amplifiers.
On computers with a sound card, use the connector on the card.
7 micro-phone/side
surround connector
Use the pink and silver connector to attach a personal computer microphone for
voice or musical input into a sound or telephony program.
On computers with a sound card, the microphone connector is on the card.