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Power LED is
OFF
Fault LED is ON
If there is no power to the switch, it cannot function.
A Power LED that is OFF can indicate:
# A loose power cord.
# Power supply failure, malfunction, or loss of power to the
power supply.
# A power supply voltage below acceptable levels.
# A high switch temperature due to fan failure or extreme
ambient temperature.
Perform the following steps in sequence; you need not proceed to
the next step if the problem is resolved:
1. Secure the power cord to the power source and check the Power
LED to see if it is ON.
2. Ensure that the voltage is within the required levels in your region.
3. Logon to Omega and run Diagnostics if you can
( Administration>Diagnostics ) and record any failures.
4. Contact Allied Telesyn's Technical Support and report the results
of the tests.
This might indicate problems with the network management
software, such as:
# An unsuccessful software download
# A failure of the power-on diagnostics
Perform the following steps in sequence; you need not proceed to
the next step if the problem is resolved:
1. Reset the stack either by:
— Pressing the RESET button on the front panel of the
switches in the stack, or
— Selecting Administration>Reset and restart
the system from Omega, if you can.
2. Make sure the RS-232 connection from the local terminal or PC to
the master switch is secure; change the cable if necessary.
If you cannot access the switch locally because of a faulty
RS-232 connection, try to access the switch through a web
browser or remotely with Telnet or an SNMP network
management program until the problem is fixed.
AT-8316F and AT-8324 Installation Guide
71
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