HP AdvanceStack Hub-16U Installation And Reference Manual page 33

LED patterns indicating problems
Power Collision AUI/Xcvr
Port
ON Appears *
solidly ON
ON * *
ON * Slow
Flash
ON * *
* This LED is not important for the diagnosis.
Diagnostic Tips
Twisted-Pair
Port
Very frequent collisions are occurring,
*
which could indicate a network fault or
improperly terminated cable.
A transceiver attached to the AUI port may
not have the SQE test disabled. For
information about the SQE test, see your
documentation accompanying your
transceiver module.
If you have an HP AdvanceStack 8U/16U
SNMP Module installed, see its manual.
The port has been auto-partitioned
Slow
because of an excessive collision
Flash
condition. Check cable connections and
status of attached network devices for
causes of the excess collisions.
The transceiver port has been
*
auto-partitioned because of too many
collisions. Check cable terminations,
connections, SQE setting on any external
transceivers, and status of attached
network devices for causes of the excess
collisions.
The hub has failed its self-test.
After self-
Power-cycle the hub. If this condition
test, all
persists, call your HP-authorized LAN
ports are
dealer or HP representative for assistance.
ON for an
extended
period of
time.
Troubleshooting
2-5