Product specifications

Problem Solving A-7
Problem Solving Using LEDs
Port
Activity
LEDs are
off.
There is low or no port
activity.
Ensure that the cable
has activity on it. If the
LED still fails to turn
on, the module is
defective.
Ensure that the port is present. If the
Port Activity LED still fails to turn
on, then turn the module off
momentarily by removing it from the
power supply. Check that the Port
Activity LEDs blink momentarily
during the LED power-up self-test.
Replace the module.
Symptom Probable Cause Corrective Action