3com 3C17502 User Manual

This chapter covers the following topics:

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The simplest way to diagnose a fault is to check the system status LEDs on the 
Fabric modules. In addition, with the DeviceMgr network management system, 
you can also locate the fault through management software.

After the switch is powered on, booting information is displayed on the 
configuration terminal. If the configuration system has failed, there is no screen 
display at the configuration terminal or the displayed characters are illegible.

If there is no information displayed on the terminal after the Switch 8800 is 
powered on, check that: 

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The power system is working normally.

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The Fabric is working normally.

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The console cable has been connected to the console port on the Fabric.

If this procedure does not reveal the problem, verify the following:

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The console cable is connected to the serial port that is configured on the 
terminal.

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Console terminal parameters are set properly. See “Setting Terminal 
Parameters” on page 29.

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The console cable is not damaged.

If the displayed characters are illegible, the console terminal parameters may not 
have been set correctly. See “Setting Terminal Parameters” on page 29. 

Table 32 describes power LEDs on the power supply.

Table 32   Power LEDs on the Power Supply 

INPUT

On — The power input is normal and the power supply switch is in 
the ON position.

 

Off — The power input has failed or has not been turned on.