Troubleshooting The Switch During Operation; Power Supply System Failure - HP 7500 Series Installation Manual

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
When you modify the settings for the console port of the switch, configure the same settings for the
console terminal.

Troubleshooting the switch during 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
When you detect configuration errors, re-configure the switch or restore the factory settings for the switch.

Power supply system failure

When the switch operates correctly, the LEDs related to the power supply system are as follows:
The LED on the power supply is green. On a power supply with multiple LEDs, each LED indicates
•
the status of a function. For more information, see
For the PWR LEDs on the MPU, the OK LED is on, and the Fail LED is off.
•
NOTE:
For more information about the PWR LEDs on an MPU and the LEDs on a power supply, see
•
C LEDs."
After the power supply to the power supply 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 supply does not work correctly.
To troubleshoot the power supply system:
1. Verify that the switches of the power supply are turned on. Power supplies 1400W DC, 2800W
AC, and 6000W AC 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 the power supply for an over-temperature condition. When a power supply is
over-temperature, it enters the self protection state. Make sure the switch is well ventilated.
3. Examine the power cable for a loose connection. If a power cable is loose, re-plug the power
cable. If a power cable is broken, replace it.
4. Examine the power supply installation. If the power supply is not fully seated, re-install the power
supply to make sure it has a close contact with the backplane of the switch.
"Hardware management and
"Appendix C
75
maintenance."
LEDs."
"Appendix