HP 100BaseT Guia do Utilizador descarregar pdf (Página 120)

HP 100Base-T Hubs Installation and Reference Guide

A-2 Troubleshooting

functioning properly. If any component fails the diagnostic

test, contact your HP-authorized reseller for assistance.

System Diagnostics

Power and Cooling Problems

If the 3RZHU indicator does not turn on when the power cord is

plugged in, you may have a problem with the power outlet,

power cord, or internal power supply as explained in the

previous section. However, if the unit powers off after running

for a while, check for loose power connections, power losses or

surges at the power outlet, and verify that the fans on the back

of the unit are unobstructed and running prior to shutdown. If

you still cannot isolate the problem, then the internal power

supply may be defective. In this case, contact

your

HP-authorized reseller for assistance.

Installation

Verify that all system components have been properly installed.

If one or more components appear to be malfunctioning (e.g.,

the power cord or network cabling), test them in an alternate

environment where you are sure that all the other components

are functioning properly.

Transmission Mode

If any devices are attached to a 10/100TX Switch Port Module,

and operate at full duplex but do not support auto-negotiation,

then you must manually set the transmission mode for this port

on the hub. The transmission mode must always be set

manually for the 100FX Switch Port Module.

The default method of selecting the transmission mode for the

10/100TX Switch Port Module is auto-negotiation. Therefore, if

the

/LQN signal is disrupted (e.g., by unplugging the network cable

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HP 100BaseT Guia do Utilizador Página 120