Chapter 15: Troubleshooting - Allied Telesis AlliedWare Plus Installation Manual

Chapter 15
Troubleshooting
This chapter contains suggestions on how to troubleshoot the switch if a
problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support at www.alliedtelesis.com/support.
Problem 1: All of the port LEDs and the Switch ID LED are off, and the
fans are not operating.
Solutions: The unit is not receiving power. If the switch has an AC power
supply, try the following:
Verify 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 a different power cord.

Verify that the voltage from the power source is within the required

levels for your region.
If the switch has the DC AT-PWR250-80 Power Supply, try the following:
Verify that the DC circuit is powered on.

Verify that the On/Off switch on the power supply is in the On

position.
Verify that the positive, negative, and ground wires are properly

connected to the AT-PWR250-80 Power Supply and DC circuit.
Refer to "Wiring the DC Connector on the AT-PWR250-80 Power
Supply" on page 137.
Try connecting the switch to another DC circuit.

Try replacing the positive, negative, and ground wires.

197