Troubleshooting with the LEDs
If you have followed the above criteria, use the LEDs to troubleshoot your
hub:
LED patterns indicating problems
Diagnostic Tips
Power Activity Cascade
Fault
LAN Port
Port
Uplink
Port
OFF
*
*
*
*
*
Verify that the AC 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. If this
condition persists, the hub, AC power supply, or
AC power cord has failed. Call your HP-authorized
LAN dealer or HP representative for assistance.
ON
*
*
*
OFF
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.
ON
*
*
ON
*
*
The hub has failed its self-test. Power-cycle the
hub. If this condition persists, the hub has failed.
Call your HP-authorized LAN dealer or
HP representative for assistance.
ON
*
*
*
*
OFF or
Flashing
when the
port is in
use
Check cabling on the indicated port.
Check the port status in the ASCII console to
determine whether:
- link training failed because of a
cabling or configuration error.
- the port on the upper hub was disabled.
- The Uplink cable was disconnected.
The Uplink port will flash if someone removes a
cable connected to this port. Reconnect the cable.
ON
*
*
*
Flashing
*
Link training has failed on the indicated port most
likely because of a faulty or improperly wired
cable. Check cabling on the port and check the
port status in the ASCII console.
* This LED is not important for diagnosis.
Troubleshooting
9
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