Removing and Installing Parts 47Back View123149104171516611251381 parallel connector Connect a parallel device, such as a printer, to the parallel connector. If you have aUSB printer, plug it into a USB connector.2 diagnostic lights (4) Use the lights to help you troubleshoot a computer problem based on thediagnostic code. For more information, see "Diagnostic Lights" on page 33.3 mouse connector Plug a standard mouse into the green mouse connector. Turn off the computer andany attached devices before you connect a mouse to the computer. If you have aUSB mouse, plug it into a USB connector.4 line-in connector Use the blue line-in connector to attach a record/playback device such as a cassetteplayer, CD player, or VCR.On computers with a sound card, use the connector on the card.5 network adapterconnectorTo attach your computer to a network or broadband device, connect one end of anetwork 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 onyour 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 yournetwork. If you must use Category 3 wiring, force the network speed to 10 Mbps toensure reliable operation.