Troubleshooting - HP J3128A AdvanceStack 10Base-T Hub-8E Installation And Reference Manual

Troubleshooting

The bottom of the Hub-8E has a troubleshooting key for the LEDs.
Use the table on the bottom of the hub to try to solve the problem
first. Most problems are because of the wrong type of cable,
improper termination of thin coax cable, bad cable, or exceeding the
maximum allowable cable lengths. Use the table below to
troubleshoot your hub.
Problem
One of the users on the network can't
communicate with another network
device through the Hub-8E.
I have coax cable connected to the hub
but the Partition LED stays orange.
I've tried everything in this table but the
hub still doesn't appear to be working.
If you are replacing your hub, remove the cables connected to the
hub before returning it to Hewlett-Packard. For instructions on how
to return the Hub-8E to Hewlett-Packard, see the warranty booklet
included with the hub.
8
Solution
There are a variety of possible solutions
to this problem:
1) Find the port that the user is
currently connected to. Check that
the Link/Activity LED is on. If it is not,
remove the cable from the port and
connect it to another port. If the LED
is still not on, use the "Test Link"
option in the user's LAN adapter test
program to verify the communication
path between two PCs (connected to
the hub) is working.
2) Connect a different cable from the
end user to the hub.
3) Perform a self-test on the LAN
adapter in the user's computer and/or
the device that cannot be reached.
4) Verify cable lengths do not exceed
100 meters.
Verify the cable is connected and
terminated properly. See the illustration
on page 6.
The hub or power supply may have
failed. Try removing the AC adapter and
reinserting it to see if the LEDs begin
normal operation. Try a different
electrical outlet. If the problem
persists, return the hub and AC adapter
to your HP-authorized dealer or reseller
following the instructions in the
warranty booklet.