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Chapter 3
Troubleshooting
This chapter contains information on how to troubleshoot the switch in the
event that a problem occurs.
If after following the instructions in this chapter you are unable to
resolve the problem, contact Allied Telesis Technical Support for
assistance. Refer to “Contacting Allied Telesis” on page 14 for
contact information.
PWR LED is Off
Check the PWR LED on the front of the switch. If the LED is OFF,
indicating that the unit is not receiving power, do the following:
Make sure that the power cord is securely connected to the power
source and to the AC connector on the back panel of the switch.
Verify that the power outlet has power by connecting another device to
it.
Try connecting the unit to another power source.
Try using a different power cord.
Check that the voltage from the power source is within the required
levels for your region.
Twisted Pair Port Link LED is Off
For twisted pair ports, verify that the LINK LED for each port is ON. If a
Link LED is OFF, do the following:
Verify that the end node connected to the port is powered ON and is
operating properly.
Check that the twisted pair cable is securely connected to the port on
the switch and to the port on the end node.
Make sure that the twisted pair cable does not exceed 100 m
(328 ft).