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PPENDIX
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T
ROUBLESHOOTING

Diagnosing Switch Indicators

Table A-1 Troubleshooting Chart
Symptom Action
PWR LED is Off • Internal power supply may be disconnected. Check connections
between the switch, the power cord and the wall outlet.
Diag LED is Amber • The system has detected a fault. Power cycle the switch to try and
clear the condition.
• If the condition does not clear, contact your dealer for assistance.
Diag LED is Flashing Amber • Check that all stacking cables are properly connected.
Stack LED is Flashing Green
or 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. Replace the
stacking cable if necessary.
Link/Act 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.