3com Network Router 6000 Owner's Manual download pdf (Page 39)

Troubleshooting of the Power System 39

4 Troubleshooting

Troubleshooting of

the Power System

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.

Troubleshooting

the Configuration

System

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

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 59 60

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3com Network Router 6000 Owner's Manual Page 39