Dell OptiPlex 980 — Desktop Service Manual page 8

Drive activity light
Network connectivity light
Diagnostic lights
Back of the computer
Link integrity light on integrated
network adapter
Network activity light on integrated
network adapter
Power supply light
Power
Wattage
Mini-tower
Desktop
Small form factor
Maximum heat dissipation
Mini-tower
Desktop
start) — indicates a problem with the
system board or power supply.
blinking blue — indicates that the
computer is reading data from or writing
data to the hard drive.
blue — indicates that a good connection
exists between the network and the
computer.
off (no light) — indicates that the
computer is not detecting a physical
connection to the network.
four amber lights on the front panel. For
more information, see Diagnostics.
green — a good 10 Mbps connection
exists between the network and the
computer.
orange — a good 100 Mbps connection
exists between the network and the
computer.
yellow — a good 1000 Mbps connection
exists between the network and the
computer.
off (no light) — the computer is not
detecting a physical connection to the
network.
yellow light — a blinking yellow light
indicates that network activity is present.
green light — the power supply is turned
on and is functional. The power cable
must be connected to the power
connector (at the back of the computer)
and the electrical outlet.
NOTE:
You can test the health of the
power system by pressing the test button.
When the system's power supply voltage
is within specification, the self-test LED
lights up. If the LED does not light up, the
power supply may be defective. AC power
must be connected during this test.
255 W
(EPA)
255 W
(EPA)
235 W
(EPA)
1000
BTU/hr
(EPA)
1000
BTU/hr
(EPA)
305 W (non-
EPA)
255 W (non-
EPA)
235 W (non-
EPA)
1603 BTU/hr
(non-EPA)
1341 BTU/hr
(non-EPA)