APPENDIX A

TROUBLESHOOTING

Diagnosing Switch Indicators

 

Troubleshooting Chart

 

 

Symptom

Action

 

 

Power LED is Off

• Internal or redundant power supply has failed or

 

is disconnected.

 

• Check connections between the switch, the

 

power cord, the wall outlet, and the RPU if you

 

are using one.

 

• If the switch is installed in a rack, check the

 

connections to the punch-down block and patch

 

panel.

 

• Contact SMC Tech Support.

 

 

Power LED is Flashing

• The switch is either downloading firmware or

 

running the Power-On Self-Diagnostics Test

 

(POST). If this LED does not stop flashing, then

 

POST has failed, and you should contact SMC

 

Tech 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.

 

• 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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SMC Networks 48-Port manual Appendix a Troubleshooting, Diagnosing Switch Indicators

48-Port specifications

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