SMC Networks SMC8724ML3 manual Diagnosing Power Problems with the LEDs, Table A-2 Power/RPU LEDs

TROUBLESHOOTING

Table A-1 Troubleshooting Chart (Continued)

Symptom	Action
Stack Link LED is	• The uplink/downlink has failed.
Flashing Green/Amber	• For the indicated stack link, check that the stacking
	cables are properly connected. Replace the stacking
	cable if necessary.
	• Power cycle the switch to try and clear the condition.
Link LED is Off	• Verify that the switch and attached device are powered
	on.
	• Be sure the cable is plugged into both the switch and
	corresponding device.
	• Verify that the proper cable type is used and its length
	does not exceed specified limits.
	• Check the adapter on the attached device and cable
	connections for possible defects. Replace the defective
	adapter or cable if necessary.

Diagnosing Power Problems with the LEDs

The Power and RPU LEDs work in combination to indicate power status as follows.

		Table A-2 Power/RPU LEDs
Power LED	RPU LED		Status
Green	Green		Internal power functioning normally; RPU is present.
Green	Amber		Internal power functioning normally; RPU plugged in but
			faulty.
Green	Off		Internal power functioning normally; RPU not plugged in.
Amber	Green		Internal power faulty; RPU delivering power.
Off	Off		Both internal power and RPU unplugged or not functioning.

A-2