Chapter 8 Troubleshooting; Troubleshooting The Configuration System; No Display On The Terminal - 3Com LS8M1P12TEH Installation Manual

Installation Manual
H3C S7500 Series Ethernet Switches
Although the S7500 series have passed the comprehensive and strict test before
delivery, faults may occur due to improper installation. This chapter describes how to
handle the faults caused by improper installation.
On the SRPU of the S7500 series, you can find the status LEDs of the LPUs, power
modules, and fan tray. You can check these status LEDs to locate the faults.
Note:
The LEDs on the standby SRPU of the S7506R are always OFF except the SRPG LED.
The SRPG LED on the standby SRPU is in the same state as that on the active SRPU.
Thus, you need not consider the LEDs on the standby SRPU when troubleshooting
power modules, fans, or LPUs.

8.1 Troubleshooting the Configuration System

If the configuration system is normal after it is powered on, the startup banner will be
displayed on the configuration terminal. If the configuration system is faulty, the
configuration terminal may display illegible characters or nothing at all.

8.1.1 No Display on the Terminal

If no information is displayed on the terminal after the switch is powered on, check
whether:
The power system works normally.
The SRPU works normally.
The console cable is connected to the console port in the SRPU.
If no problem is found after the above checks, check whether:
The console cable is connected to a wrong serial port. (The port in use is not the
one set on the terminal.)
The terminal parameters are configured incorrectly.
These parameters should be configured as follows:
–Bits per second: 9600
–Data bits: 8
–Parity check: None

Chapter 8 Troubleshooting

8-1
Chapter 8 Troubleshooting