Led Error Indications - HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual

Troubleshooting

LED Error Indications

The tables on the next two pages describe LED patterns that indicate
error conditions.
LED patterns indicating problems
Power Collision Fault Security
OFF * *
ON * OFF OFF
ON Appears *
solidly
ON
*This LED is not important for the diagnosis.
4-4
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RPS Exp Port
Slot
* * * *
* * OFF or
flashing
intermit-
tently for
a port in
use.
* * * *
Diagnostic Tips
Check power cord and power source. If OK, replace
hub.
Check cabling on indicated port.
Use HP Stack Manager or the ASCII console STatus
command to determine the state of the port. For
HP Stack Manager, review the graphical image of
your hub to determine whether:
– the port was disabled by the Port function. Re-
enable if desired. A disabled port is grayed-out with
a black bar through it.
– For a twisted-pair port, link beat is not detected. In
this condition, the link beat bar (below the port
symbol on the graphic display) will be red. Be sure
the cable is properly connected.
– For the ThinLAN port, Thinwatch is disabled (the
default value) and the port is auto-segmented (the
port symbol will be red).
Thinwatch improves diagnosis of a faulty ThinLAN
port. Configure Thinwatch from HP Interconnect
Manager or from the ASCII terminal.
Very frequent collisions could indicate a network
fault or improperly terminated cable.
A transceiver attached to the AUI port may not have
the SQE test disabled.