Filter
Top Products
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