Dell OptiPlex 980 (Early 2010) - Manual (Page 8)

start) — indicates a problem with the
system board or power supply.
Drive activity light blinking blue — indicates that the
computer is reading data from or writing
data to the hard drive.
Network connectivity light 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.
Diagnostic lights four amber lights on the front panel. For
more information, see Diagnostics.
Back of the computer
Link integrity light on integrated
network adapter
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.
Network activity light on integrated
network adapter
yellow light — a blinking yellow light
indicates that network activity is present.
Power supply light 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.
Power
Wattage
Mini-tower 255 W
(EPA)
305 W (non-
EPA)
Desktop 255 W
(EPA)
255 W (non-
EPA)
Small form factor 235 W
(EPA)
235 W (non-
EPA)
Maximum heat dissipation
Mini-tower 1000
BTU/hr
(EPA)
1603 BTU/hr
(non-EPA)
Desktop 1000
BTU/hr
(EPA)
1341 BTU/hr
(non-EPA)