Installation Manual 
Quidway S3000-EI Series Ethernet Switches
  Chapter 6  Maintenance and Troubleshooting
 
6-1 
Chapter 6  Maintenance and Troubleshooting 
6.1  Power System Failure 
You can check whether the power system of the switch fails by viewing the POWER 
indicator on the front panel. If it is in normal operation, the POWER indicator should 
stay on. Otherwise, please check whether 
  The switch power cord is correctly connected. 
  The power input to the switch matches the requirement as labeled on the switch. 
6.2  Configuration System 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. 
I. Troubleshooting when there is no terminal display 
If there is no output information after the configuration is powered on, please check 
whether 
  The power supply is normal 
  The Console cable is connected correctly 
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 hyper 
terminal) parameters. Please perform the corresponding check. 
II. 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). Please confirm the 
terminal parameter (such as hyper terminal) settings: baud rate should be set to 9600, 
data bit to 8, parity to none, stop bit to 1 and flow control to none, and select VT100 
as terminal emulation.