H3C Technologies H3C S7500E Series Switches - Manual (Page 87)

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• The console cable fails. To solve this problem, replace the console cable.
Garbled characters on the terminal
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
When you modify the settings for the console port of the switch, configure the same settings for the
console terminal.
Troubleshooting the switch during the operation
At the CLI, you can use related commands to display the switch information and locate the failures. For
more information about the CLI, see " Hardware management and maintenance ."
When you detect configuration errors, re-configure the switch or restore the factory settings for the switch.
Troubleshooting the power supply system
When the switch operates correctly, the LEDs related to the power supply system are as follows:
• The LED on the power module is green. On a power module with multiple LEDs, each LED indicates
the status of a function. For more information, see "
Appendix C LEDs ."
• For the PWR LEDs on the SRPU, the OK LED is on, and the Fail LED is off.
For more information about the PWR LEDs on an SRPU and the LEDs on a power module, see " Appendix
C LEDs ."
NOTE:
After the power supply to the power module is turned off, it is normal that the LEDs stay on for a period of
time.
When the LEDs do not conform to the status mentioned above, the power module is not operating
correctly.
To troubleshoot the power supply system:
1. Verify that the switches of the power module are turned on. Power modules PSR1400-D,
PSR2800-ACV, and PSR6000-ACV each have a system power switch and a PoE power switch. If
PoE is not enabled on the switch, you do not need to turn on the PoE power switch and you only
need to make sure the system power switch is turned on.
2. Examine whether the power module is over-temperature. When a power module is
over-temperature, it enters the self protection state. Make sure the switch is well ventilated.
3. Verify the power cable connections. If a power cable is loose, re-plug the power cable. If a power
cable is broken, replace it.