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A Troubleshooting
Diagnosing LED Indicators
System Self-Diagnostic Test Failure
If the Diag LED indicates a failure of the system power-on-self-test (POST), you can
use a console connection to view the POST results. The POST results may indicate a
failed component or help troubleshoot the problem. For more information on
connecting to the console port and using the CLI, refer to the CLI Reference Guide.
Note that a POST failure normally indicates a serious hardware fault that cannot be
rectified or worked around. If you encounter a POST failure, you should contact
your dealer for assistance.
Table 13: Troubleshooting Chart
Symptom Action
Power LED is Off
â—†
Check connections between the switch, the power cord, and the AC
power outlet.
â—†
Check the AC power outlet is supplying 110-240 VAC.
â—†
Contact your dealer for assistance.
Diag LED is on Amber
â—†
Power cycle the switch to try and clear the condition.
â—†
If the condition does not clear, contact your dealer for assistance.
RPS LED is on Amber
â—†
Replace the RPS unit connected to the switch.
â—†
If the condition does not clear, contact your dealer for assistance.
Link/Act LED is Off
â—†
Verify that the switch and attached device are powered on.
â—†
Check the cable connectors are firmly plugged into the switch and
corresponding device.
â—†
If the switch is installed in a rack, check the connections to the
punch-down block and patch panel.
â—†
Verify that the proper cable type is used and its length does not
exceed specified limits.
â—†
Check the attached device and cable connections for possible
defects. Replace the defective cable if necessary.
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