Dell optiplex 790 mini-tower Owner's Manual page 92

System Board Connectors
Front panel control
Mini-Tower, Desktop, Small Form
Factor
Ultra Small Form Factor
Desktop, Small Form Factor, Ultra
Small Form Factor
Processor
Processor Fan
Power connector
Mini-Tower, Desktop, Small Form
Factor
Ultra Small Form Factor
Controls and Lights
Front of the computer:
Power button light
Drive activity light
Diagnostic lights
Back of the computer:
Link integrity light on integrated
network adapter
92
one 34-pin connector
one 20-pin connector
two 2-pin connectors
one 1155-pin connector
one 5-pin connector
one 34-pin connector
none
Blue light — Solid blue light indicates
power-on state; blinking blue light indicates
sleep state of the computer.
Amber light — Solid amber light when the
computer does not start indicates a problem
with the system board or power supply.
Blinking amber light indicates a problem
with the system board.
Blue light — Blinking blue light indicates
that the computer is reading data from or
writing data to the hard drive.
Four lights located on the front panel of the
computer.
Green — a good 10 Mbps connection exists
between the network and the computer.