3Com 3C13636 manual Troubleshooting the Power System, Troubleshooting the Configuration System

3Com Router 3000 Ethernet Family	4. Troubleshooting
Installation Guide

Chapter 4 Troubleshooting

4.1 Troubleshooting the Power System

Symptoms:

POWER LED cannot light.

Solution:

Check that:

zThe power switch of the router is turned on.

zThe switch of the power source is turned on.

zThe power cord of the router is properly connected.

zThe correct power source is used.

Caution:

Do not plug/unplug the power cord when power is being supplied. If POWER LED is still OFF after you check against the items listed above, contact your agent.

4.2 Troubleshooting the Configuration System

If the router is operating normally after it is powered on, it displays the start-up information on the console terminal. If the configuration system has faults, it displays illegible characters or nothing at all.

Symptoms 1:

Nothing is displayed on the terminal screen after the router is powered on.

Solution:

Step 1: Check that:

zThe power system is correctly working.

zThe console cable is connected correctly.

Step 2: Check the console cable and the terminal (such as the HyperTerminal) parameter settings.

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