Led Error Indications - HP AdvanceStack Hub-16U Installation And Reference Manual

Troubleshooting

LED Error Indications

LED patterns indicating problems
Power
OFF
*This LED is not important for the diagnosis.
2-4
Collision AUI/Xcvr
Port
* *
ON * *
ON * OFF
ON * *
Twisted-Pair
Port
Verify that the power cord is plugged into an
*
active power source and to the hub. Make
sure these connections are snug. Try power
cycling the hub by unplugging and plugging
the hub back in.
If the Power LED is still not on, verify the ac
source works by plugging another device into
the outlet. Or try plugging the hub into a
different outlet or try a different power cord.
If this condition persists, call your
HP-authorized LAN dealer or HP
representative for assistance.
Check cabling on the indicated port all the
OFF
way out to the device attached to that port.
Faulty wiring or a bad connection could exist
somewhere in that connection.
The end node or hub attached to the port is
off.
If you have an HP AdvanceStack 8U/16U
SNMP Module installed, see the module
manual.
If Port 16, check the position of the
MDI/MDI-X switch. For hub-to-hub
connections, set the switch to MDI. For
hub-to-PC connections, set the switch to
MDI-X.
Verify that the HP Transceiver Module is
*
firmly inserted into the AUI/Xcvr slot into the
front of the hub. See the documentation
accompanying the HP Transceiver Module for
more troubleshooting information.
Check cabling on indicated port.
Flashing
If you have an HP AdvanceStack 8U/16U
intermittently
SNMP Module installed, see the HP
AdvanceStack 8U/16U SNMP Module manual.
Diagnostic Tips