Allied Telesis AT-x930-28GPX, Installation Manual

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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.