Service and User Manual (Short- and Long-Wave)

If the Hub Fault LED Stays on After Self-Test 73
Troubleshooting
If the Hub Fault LED Stays on After Self-Test
If the hub Fault LED stays on after the self-test is complete, find the symptom that best
describes the situation, then attempt the solution. When more than one solution is possible,
the most likely one is listed first.
Symptom Cause/Solution
The host can access devices, but
the hub Fault LED stays on after
self-test.
– One or more fans are faulty. Replace the fan module.
Although the module will continue to run with two fans, a
full complement of fans ensures system and data integrity.
– The hub is experiencing an internal temperature or
memory fault. Replace the hub.
The host cannot access devices,
and the Fault LED stays on after
self-test.
– The hub is faulty. Replace the hub.