Compaq Netelligent 1005 User Manual page 8

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Symptom: The partition indicator lights steadily or flashes.
Causes: The hub has a partitioned port, or a workstation's network adapter or
network software is defective. Flashing green and yellow indicates activity
while the port is partitioned.
Solution: If a port has been partitioned, the hub automatically enables the port
when the fault is corrected, or the hub detects activity without incurring a
collision.
Symptom: The port link indicator remains off.
Causes: A workstation's network adapter, cable, or hub port is defective.
Solution: The most common cause is a defective network adapter or cable
connection. Check the corresponding cable connections, or the workstation's
network adapter for possible defects. Verify that the correct cable type (straight
or crossover) is being used. (Note that crossover cable is only required if you
cascade hubs via the RJ-45 station ports; that is, the UPLINK port is not used.)
Replace the defective cable or adapter.
Ensure that cable distances, repeater limits, and other physical aspects of
the installation do not exceed IEEE 802.3 recommendations.
Verify that the cabling type used is correct. Then tighten all cable
connections.
Be sure the network adapter cards installed in the workstations and
cable connections are in good working condition.
Be sure the network is properly configured and that all hubs are
connected to the network. Sometimes, hubs may be unintentionally
disconnected from the network.
You cannot use Port 5 and the UPLINK port at the same time. Be sure
that when you use the UPLINK port, Port 5 is not connected to a node.