6-2
Power Supply Failure
You can determine whether the power system of a switch functions normally by viewing the power LED
on the front panel. The power LED stays on when power system is normal. Otherwise, please check
whether:
z The power cord is correctly connected, the power receptacle on the switch and the AC power
socket function normally.
z The power input to the switch is normal.
If the power cord connection, power input system are normal after troubleshoot but the power LED still
stay off, please contact your sale agent for help.
Configuration Terminal Failure
After the switch is powered on and the system is normal, the booting information will be displayed on the
configuration terminal. If the configuration system has any faults, there will not be any screen display at
the configuration terminal or the displayed characters will be totally illegible.
Troubleshooting when there is no terminal display
If there is no output information after the configuration is powered on, please check whether:
z The power supply is normal
z The console cable is properly connected
If no problems are found after the above-mentioned items have been checked, the cause may lie in the
console cable or the settings of the terminal (such as HyperTerminal) parameters. Please perform the
corresponding check.
Troubleshooting when the terminal display is illegible
If there is illegible display at the configuration terminal, the cause might lie in the parameter setting error
at the terminal (such as HyperTerminal). Verify the following terminal parameter (such as hyper terminal)
settings:
z Baud rate: 9,600
z Data bits: 8
z Parity: none
z Stop bits: 1
z Flow control: none
z Emulation: VT100.
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