Dell 720H2C appendix Physical, Environmental

	amber light — Blinking amber indicates a problem
	with an installed device; solid amber indicates an
	internal power problem.
Hard-drive access light	green
Network activity light (front panel)	solid green indicates network connection
Link integrity light (on integrated network adapter)	green light — A good connection exists between a
	10-Mbps network and the computer.
	orange light — A good connection exists between a
	100-Mbps network and the computer.
	yellow light — A good connection exists between a 1-
	GB (1000-Mbps) network and the computer.
	off (no light) — The computer is not detecting a
	physical connection to the network.
Activity light (on integrated network adapter)	yellow blinking light when there is activity on the
	network; if there is not any network activity, the light
	will be off
Diagnostic lights	four lights on the front panel (see Diagnostic Lights)
Standby power light	AUXPWR on the system board
Front panel LEDs	eight multi-colored LEDs provide illumination for the
	front of the computer
	NOTE: The color of the front panel LEDs can be
	adjusted in system setup (see System Setup).
Back panel LEDs	two multi-colored lights provide illumination for the
	I/O panel on the back of the computer
	NOTE: The color of the back panel LEDs can be
	adjusted in system setup (see System Setup).
Power
DC power supply:
	CAUTION: To reduce the risk of fire, electric shock,
	or injury, do not overload an electrical outlet,
	power strip, or convenience receptacle. The total
	ampere rating of all products plugged into an
	electrical outlet, power strip, or other receptacle
	should not exceed 80 percent of the branch circuit
	rating.
Wattage	750 W or
	1 KW
Voltage (see the safety instructions located in	auto-sensing power supply—90 V to 265 V at 50/60
the Product Information Guide)	Hz
Backup battery	3-V CR2032 lithium coin cell
Physical
Height
Without stand	55.5 cm (21.9 inches)
With stand	57.2 cm (22.5 inches)
Width
Without stand	21.9 cm (8.6 inches)
With stand	35.6 cm (14.0 inches)
Depth	59.4 cm (23.4 inches)
Weight
Typical configuration	21.7 kg (47.8 lb)
Maximum configuration	25.6 kg (56.4 lb)
Environmental
Temperature:
Operating	10° to 35°C (50° to 95°F)
Storage	–40° to 65°C (–40° to 149°F)