Dell 980 service manual Power

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

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.

Power
Wattage
Mini-tower	255 W	305 W (non-
	(EPA)	EPA)
Desktop	255 W	255 W (non-
	(EPA)	EPA)
Small form factor	235 W	235 W (non-
	(EPA)	EPA)
Maximum heat dissipation
Mini-tower	1000	1603 BTU/hr
	BTU/hr	(non-EPA)
	(EPA)
Desktop	1000	1341 BTU/hr
	BTU/hr	(non-EPA)
	(EPA)