Nortel Networks 350 manual Normal Power-Up Sequence, Corrective Actions

Troubleshooting

Normal Power-Up Sequence

In a normal power-up sequence, the LEDs appear as follows:

1.After power is applied to the switch, the Pwr (Power) LED turns on within five seconds.

2.The switch initiates a self-test, during which the port LEDs display various patterns to indicate the progress of the self-test.

3.Upon successful completion of the self-test (within 10 seconds after power is applied), the Status LED turns on.

4.The remaining port LEDs indicate their operational status, as described in Table 4-2.

Table 4-2. Corrective Actions

Symptom Probable cause Corrective action

All LEDs are off.	The switch is not receiving AC
	power.

Verify that the AC power cord is fastened securely at both ends and that power is available at the AC power outlet.

The fans are not operating or the airflow is blocked, causing the unit to overheat.

Verify that there is sufficient space for adequate airflow on both sides of the switch.

Note: Operating temperature for the switch must not exceed 40°C (104°F). The switch should not be placed in the direct sunlight or near warm air exhausts or heaters.

The Activity LED for a connected port is off or does not blink (and you have reason to believe that traffic is present).

The switch is experiencing a See “Port Connection Problems” on page 4-6. port connection problem.

The switch’s link partner is not autonegotiating properly.

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304376-B Rev 00 4-5