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Appendix A: Troubleshooting
Diagnosing Switch Indicators
Table A-1. Troubleshooting Chart
Symptom Action
PWR LED is Off •Check connections between the switch, the power cord and
the wall outlet.
•Contact your dealer for assistance.
PWR LED is
Amber
Internal power supply has failed. Contact your local dealer for
assistance.
Diag LED is
Amber
•Power cycle the switch to try and clear the condition.
•If the condition does not clear, contact your dealer for
assistance.
Stack LED is
Flashing Amber
• The stack has not completed its initial configuration. Wait a
few minutes for the process to complete.
• If flashing continues, check that the Master Select button is
pressed in on only one switch.
• Check that all stacking cables are properly connected.
Link LED is Off
• Verify that the switch and attached device are powered on.
• Be sure the cable is plugged into both the switch and
corresponding device.
• If the switch is installed in a rack, check the connections to
the punch-down block and patch panel.
• Verify that the proper cable type is used and its length does
not exceed specified limits.
• Check the adapter on the attached device and cable
connections for possible defects. Replace the defective
adapter or cable if necessary.
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you
may
h
ave a problem with the power outlet, power cord, or internal power supply.
however, if the unit powers off after running for a while, check for loose power
connections, power losses or surges at the power outlet. If you still cannot isolate
the problem, the internal power supply may be defective.
