At-8412 Line Cards; At-8413 Line Cards; Troubleshooting The Power Supplies - Allied Telesis AT-8400 Series Reference Manual

Troubleshooting
AT-8412 Line
Cards
AT-8413 Line
Cards

Troubleshooting the Power Supplies

102
❑ If the AT-8411 line card operates properly, but the RDY LED is OFF
call Technical Support.
❑ If the card is seated properly, but all the LEDs are OFF, the card is
not properly initialized. Check the console for initialization
information.
The AT-8412/SC and AT-8412/MT line cards contain a D/C LED. Under
normal operating conditions, the D/C LED is OFF when the port is
operating in half-duplex mode. If this LED is OFF and there is a
communication problem with the end nodes, it may be that the two
sides are working in half-duplex mode and data collisions are not
occurring. Check that the end-nodes are operating in the same duplex
mode.
For the AT-8413 line card, do the following if the D/C LED is OFF:
❑ Check that the chassis is receiving power.
❑ Make sure there is power to the end node.
❑ Check that the cable is securely connected to the port on the line
card and on the end node.
❑ Check that the correct type of cable, either twisted-pair or fiber
optic, is connected to the line card.
This section covers troubleshooting information for both the AT-PWR10
and AT-PWR11 Power Supplies.
If you have lost power to the AT-PWR10 or AT-PWR11 Power Supplies,
check the LEDs on the power supplies and then use the following
guidelines for both AC or DC chassis.
If both the POWER and FAULT LEDs are OFF, do the following:
❑ Check that the power supply is firmly seated in its slot in the
chassis.
❑ Check that the two screws on the power supply are securely
fastened. If they are loose, use a Phillips screwdriver to tighten
them.
❑ If you cannot insert a power supply completely into the chassis,
check that you are inserting the appropriate power supply for
your type of chassis. The AC chassis are keyed to only accept the
AT-PWR10 power supply while the DC chassis are keyed to only