H3C Technologies H3C S5120 Series Switches - Manual (Page 41)

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Fan failure
You can look at the system status LED and the seven-segment LED of an S5120-EI switch to identify a fan
failure. If both LEDs are behaving as described in
Table 6 , a fan failure occurs.
Table 6 Fan failure LEDs description
LED Mark State
System status LED PWR/SYS Steady red
Seven-segment LED Unit
The LED flashes F for fan failure.
The S5120-EI Switch Series uses built-in fans. If a built-in fan failure occurs, contact your H3C sales agent
or service engineer for assistance and do not attempt to fix the problem yourself.
NOTE:
To ensure normal operation of the switch, contact the local sales agent or service engineer as soon as
possible when a built-in fan failure occurs.
Configuration terminal problems
If the configuration environment setup is correct, the configuration terminal displays booting information
when the switch is powered on. If the setup is incorrect, the configuration terminal would display nothing
or garbled text.
No terminal display
If the configuration terminal displays nothing when the switch is powered on, verify that:
• The power supply is normal.
• The console cable is correctly connected.
• The console cable has no problem and the terminal settings are correct.
Garbled terminal display
If terminal display is garbled, verify that the following settings are configured for the terminal, for
example, HyperTerminal:
• Baud rate—9,600
• Data bits—8
• Parity—none
• Stop bits—1
• Flow control—none
• Emulation—VT100
•