Troubleshooting Startup Problems - 3Com NETBUILDER II Installation Manual

A
Troubleshooting
Startup Problems
Symptoms
Action
T
ROUBLESHOOTING AND
M
AINTENANCE
This chapter describes how to troubleshoot and replace the Ethernet module. Possible
malfunctions that can occur include:
Nonfunctional module
Self-test failure at startup
AUI or BNC transmission failure
This following sections describe the symptoms of a malfunction and the suggested
corrective action to take.
The following symptoms indicate a self-test failure at startup, or at Reset if parameters
are set to run a self-test.
The Status LED, normally yellow when the module self-test is running, changes to a
blinking red.
A self-test failure message is displayed on the LCD, as shown in Figure A-1.
Module
being tested
Slot number of module
Self test
ST:ENET: # : TTTT
FAIL XXXX
Failure description
Figure A-1 LCD Self-Test Failure Message
The message format also identifies the subtest performed on the module that failed,
and the nature of the failure.
The following self-test failure message also appears on the connected terminal
monitor:
Ethernet Controller - Self-Tests Failed - Slot X
The value of X can be 1 through 8, depending on which NETBuilder II chassis you have.
Observe the reason for failure described in the LCD message (FAIL = ) and take the
appropriate corrective action, if possible. If you cannot correct the problem, and the
module fails after removing and reinstalling it, contact 3Com or your network supplier
for assistance.
Subtest being performed
on module