A-1
Appendix A: Troubleshooting
Diagnosing Switch Indicators
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may
have 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, and verify that the fans on
the unit are unobstructed and running prior to shutdown. If you still cannot isolate the
problem, then the internal power supply may be defective.
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (such as the power cord or network
cabling), test them in an alternate environment where you are sure that all the other
components are functioning properly.
Table A-1 Troubleshooting Chart
Symptom Action
Power LED is Off • Power supply is disconnected.
• Check connections between the switch, power cord, and wall outlet.
• Contact your dealer for assistance.
System LED is Flashing
Amber
• Power cycle the switch to try and clear the condition
• If the condition does not clear, contact your dealer for assistance
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.
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