20 About Your Computer

Front-Panel Connectors

1power supply test
switch
Used to test the power supply.
2power 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.
3card 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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