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20 About Your Computer
Front-Panel Connectors
1 power supply test
switch
Used to test the power supply.
2 power supply
diagnostic LED
Indicates power availability for power supply.
• Green light — Indicates power availability for power supply.
• No light — Indicates no power available for the power
supply or the power supply is not working. For more
information, see "Power Lights" on page 89.
3 card slots Access connectors for any installed PCI or PCI Express cards.
NOTE: Some connector slots support full-length cards.
4 back I/O
connectors
Plug USB and other devices into the appropriate
connectors (see "Back-Panel Connectors" on page 21).
5 power connector Insert the power cable. The appearance of this connector
may differ from what is pictured.
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