User's Manual

A-1
A PPENDIX A
T ROUBLESHOOTING
Diagnosing Switch Indicators
Troubleshooting Chart
Symptom Action
Power LED is Off • Internal power supply has failed or is disconnected.
• Check connections between the switch, the power
cord, the wall outlet.
• Contact SMC Technical Support.
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.
• Verify that the proper cable type is used and its length
does not exceed specified limits.
• If the switch is installed in a rack, check the
connections to the punch-down block and patch
panel.
• Check the adapter on the attached device and cable
connections for possible defects. Replace the
defective adapter or cable if necessary.