Back View (Desktop Orientation) - Dell Precision 490 Quick Reference Guide

9 power light
10 headphone connector
11 microphone connector
12 network link light
13 diagnostic lights (4)

Back View (Desktop Orientation)

1
1 back panel connectors Plug serial, USB, and other devices into the appropriate connector.
2 card slots
3 power connector
The power light illuminates and blinks or remains solid to indicate
different states:
• No light — The computer is turned off.
• Steady green — The computer is in a normal operating state.
• Blinking green — The computer is in a power-saving state.
• Blinking or solid amber — See "Power Problems" in your User's Guide.
To exit from a power-saving state, press the power button or use the keyboard or
the mouse if it is configured as a wake device in the Windows Device Manager.
For more information about sleep states and exiting from a power-saving state,
see your User's Guide.
See "Diagnostic Lights" on page 38 for a description of light codes that can help
you troubleshoot problems with your computer.
Use the headphone connector to attach headphones.
Use the microphone connector to attach a personal computer microphone for
voice or musical input into a sound or telephony program.
The network link light is on when a good connection exists between a 10-Mbps,
100-Mbps, or 1000-Mbps (or 1-Gbps) network and the computer.
Use these lights to help you troubleshoot a computer problem based on the
diagnostic code. For more information, see "Diagnostic Lights" on page 38.
2
Access connectors for any installed PCI, PCI-X, or PCI Express cards.
NOTE:
The slot farthest to the left and the two slots on the right support half-length
cards: one PCI Express x8 slot (wired as x4) and two PCI-X slots. The center three slots
support full-length cards: one PCI Express x16 slot, one PCI Express x8 slot (wired as x4)
and one PCI slot.
Insert the power cable.
3
Quick Reference Guide
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