Bootrom Password Loss; Power Supply Failure; Configuration System Failure - H3C S5500-28C-EI Installation Manual

Installation Manual
H3C S5500-EI Series Ethernet Switches
Select 7, and then restart the switch. After the switch is restarted, the user password is
removed.

6.2.2 BootROM Password Loss

Please contact with your sales agent.

6.3 Power Supply Failure

You can check whether the power system of the switch fails by viewing the PWR LED
on the front panel. When the power supply system functions normally, the PWR LED
should be ON. Otherwise, please check whether
The switch power cable is properly connected.
The power supply meets the requirement.

6.4 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 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 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). Verify the following
terminal parameter (such as hyper terminal) settings:
Baud rate: 9,600
Data bits: 8
Parity: none
Stop bits: 1
Flow control: none
Emulation: VT100.
Chapter 6 Maintenance and Troubleshooting
6-2