Nortel Networks 24T manual Normal Power-Up Sequence, Corrective Actions

Troubleshooting

Advertencia: A fin de evitar dañ os personales por corrientes eléctricas peligrosas, no desmonte nunca la cubierta superior de este dispositivo. Los componentes internos no son reparables por el usuario.

Avvertenza: Per evitare lesioni fisiche dovute a scariche pericolose di corrente, non rimuovere mai il coperchio superiore del dispositivo. I componenti interni non possono essere manipolati dall'utente.

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 5 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.

(continued)

309985-B Rev 00 4-5