HP P4459A manual Reading The Power, Fault, and Initialization LEDs

					Fibre Loop Switch Troubleshooting
Table 5: Reading The Power, Fault, and Initialization LEDs
	Label	LED Color/		Interpretation	Possible Causes
		Pattern
	Power	Green/ON		The unit is connected to	This is the normal state when powered
				an AC power source	on.
				and the internal power
				supply is functioning.
		OFF		No power within the	-The line has no voltage.
				switch.	-The switch is disconnected or the power
					cable is bad.
					-The switch is faulty.
	Fault	Amber/ON		-Switch is running a	- This is the normal self-test state.
				self-test.	-If the test fails, the switch may be faulty.
				-If the light remains on
				after 15 seconds, the
				switch failed the self-
				test or an environmen-
				tal fault has occurred.
		OFF		Self-test completed	Normal running state.
				with no fault found.
Table 6: Reading The Port LEDs
	Link		Fault	Interpretation	Possible Causes
	(Green		(Amber)
	OFF		OFF	No signal	Either:
					a. no GBIC has been installed
					or
					b. no cable with a valid signal has been
					attached since the GBIC was
					installed.
	ON		OFF	Good Signal	Normal state for a valid port connection
	OFF		ON	Port is bypassed	Bad signal or no signal.

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