H3C Technologies H3C S5830 Series Switches - Manual (Page 48)

Maintenance and troubleshooting
Power module failure
When a power module is operating properly, its status LED is green. If not, follow these steps to
troubleshoot the power module:
1. Check for an over-temperature condition. Over-temperature can cause a power module to enter
the protection state. Make sure the switch is well ventilated.
2. Check for loose power cord connection, and reconnect the power cord. If the power cord is
broken, replace it.
3. Verify that the power module is fully seated in the slot.
4. Verify that the power source is normally supplying power at the correct voltage.
5. If the other power module slot is empty, plug the power module into the empty slot to check for an
operating anomaly.
6. Plug a new power module of the same model into the same slot, and connect it to the same power
input end. If the new power module can work properly, the old power module has failed. Contact
the H3C local agent to replace the old power module.
Fan failure
When a fan tray is operating properly, its status LED is green. If the LED is red or off, follow these steps
to troubleshoot the fan tray:
1. Verify that the switch and the power modules are operating properly.
2. Verify that the air intakes and exhaust vents of the chassis are not blocked.
If the problem persists, contact the H3C local agent or technical support engineer for help.
Configuration terminal problems
If the configuration environment setup is correct, the configuration terminal displays boot information
when the switch is powered on. If the setup is incorrect, the configuration terminal displays nothing or
garbled text.
No terminal display
If the configuration terminal displays nothing when the switch is powered on, verify the following items:
• The power supply is supplying power to the switch.
• The console cable is properly 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
42