Common Problems And Solutions - Allied Telesis AT-8600 Hardware Reference Manual

28
Power LED is off
L/A LED on a port
is off
Fault LED is on
C613-03080-00 REV G

Common Problems and Solutions

If the power LED is off, it may indicate the following:
a loose power cord
■
a power supply failure
■
Perform the following steps in sequence:
1. Check that the power cord connections are secure.
2. Check that all switches and circuit protection devices are in the ON position.
3. Ensure that the supply voltage is within the operational range (110/240
VAC 50/60 Hz).
If the Link/Activity LED is off, it may indicate the following:
a loose data cable
■
the device at the other end of the connection is not working properly or is
■
turned off
the data cable is not wired correctly
■
the network administrator has manually disabled the port through the
■
software
the port's selected transmission mode does not match that of the attached
■
device
Perform the following steps in sequence:
1. Make sure the data cable connections are secure.
2. Make sure the device at the other end of the connection is switched on and
working properly.
3. Check that the data cable is wired correctly.
4. If you can, log in and check the port status. Refer to the Installation and
Safety Guide for basic login instructions or to the Getting Started chapter in
the Software Reference.
5. If the port is enabled, make sure the transmission speed matches that of the
connected device (auto-negotiating, full or half-duplex).
If the port is disabled, someone has used the software to manually disable
it. You should find out why the port was disabled before enabling it.
If the fault LED is on, it may indicate the following:
there is a problem with the switch or RPS PSU
■
the switch or management software is malfunctioning
■
a hardware fault is preventing switch start-up
■
Perform the following steps in sequence:
1. Check "System LEDs" on page 7
flashing sequences.
2. Restart the switch by entering the RESTART REBOOT command.
3. If you were attempting to download software or manage the switch via the
RS-232 terminal Port, check that connections between the Terminal Port and
local terminal or PC are secure.
for descriptions and explanations of LED
AT-8600 Series