Troubleshooting; Troubleshooting Of The Power System 39; Troubleshooting The Configuration System - 3Com 6000 series Getting Started Manual

Troubleshooting of
the Power System

Troubleshooting

the Configuration
System
4 Troubleshooting
Symptom: The RUN LED on the PSU is OFF or blinking.
Solution: Check that:
The power switch on the router is turned on.
■
The switch of the power source is turned on.
■
The power cord is correctly connected.
■
The power source meets the requirement of the router. If the PSU is
■
DC-input, check the AC/DC OK LED: solid ON means the input
voltage is normal (85 to 264 V), off means the input voltage is
abnormal.
If the router passes POST after powered up, the console screen displays
the startup banner; if faults occur to the configuration system, the
console screen displays nothing or only illegible characters.
Symptom 1: After the router is powered on, the console screen
displays nothing.
Solution: Check that:
The power system is normal.
■
The console cable is correctly connected.
■
Check the console cable and the terminal (HyperTerminal for example)
settings.
Symptom 2: After the router is powered on, the console screen
displays illegible characters.
Solution: Verify that the terminal settings are as follows:
Baud: 9600
Data bits: 8

Troubleshooting of the Power System 39