Chapter 7 Troubleshooting; Troubleshooting Of The Power System; Troubleshooting Of The Console Terminal - 3Com 5000 Series Installation Manual

3Com Router 5000 Family
Installation Guide

7.1 Troubleshooting of the Power System

1) Fault
POWER LED is OFF or blinking.
2) Troubleshooting
Please check:
Whether the power switch of the router is turned on.
Whether the power supply switch is turned on.
Whether the power cord of the router is properly connected.
Whether the power supply matches the requirement of the router.
Caution:
Do not hot swap the power cord. After having checked the items above, if the POWER
LED is still OFF, please contact the agent.

7.2 Troubleshooting of the Console Terminal

After the Power-On Self-Test (POST) of the router, if the system operates normally, the
start-up information should be displayed on the console terminal. If the configuration
system has some faults, the terminal may not display anything or may display only
illegible characters.
I. Troubleshooting of "nothing being displayed on the terminal"
1) Fault
After the POST of the router, the terminal does not display any information.
2) Troubleshooting
Step 1: please check:
Whether the power system is normal.
Whether the console cable is connected correctly.
Step 2: If no problems are found after performing the above checks, it is likely to be the
problem of the console cable or the terminal (e.g., the HyperTerminal) parameters.
Please check the cable or the parameters.

Chapter 7 Troubleshooting

3Com Corporation
7-1
Chapter 7 Troubleshooting