H3C Technologies H3C MSR 20-2X[40] - Manual (Page 74)

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Troubleshooting
Troubleshooting the Power System
Symptom:
The PWR LED on the PSU is OFF.
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
Troubleshooting the Configuration System
If the router passes POST after powered on, 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:
Step 1: Check that:
• The power system is normal.
• The console cable is correctly connected.
Step 2: 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
Stop bit: 1
Parity: None
Flow control: None
Terminal emulation: VT100
Reconfigure the parameters if their values are different.