Reference Guide

LED Error Indications
LED patterns indicating problems Diagnostic Tips
Power Collision AUI/Xcvr
Port
Twisted-Pair
Port
OFF * * *
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.
ON * * OFF
Check cabling on the indicated port all the
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.
ON * OFF *
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.
ON * * Flashing
intermittently
Check cabling on indicated port.
If you have an HP AdvanceStack 8U/16U
SNMP Module installed, see the HP
AdvanceStack 8U/16U SNMP Module manual.
*This LED is not important for the diagnosis.
Troubleshooting
Troubleshooting
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