3Com 5102B-EE Power-Up Problem Resolution, Problem Possible Solutions

Note: The loopback connector must be attached to the AUI port or the self-test will not function properly.

Table 2-4. Power-Up Problem Resolution

Problem	Possible Solutions
All indicators are off	Verify that the concentrator is receiving
	power.
	Press the LED/Channel Check button on the
	ONline Controller Module to check if the
	LEDs light.
	Pull the Bridge Module out using the
	module extractor and re-insert it into the
	concentrator.
The Test LED is blinking	Your unit failed the power-up self-test.
	Write down the LED blink sequence
	displayed on the front panel and refer to
	Appendix D to identify the error code.
	If you cannot correct the error at your site,
	contact 3Com Customer Support as
	explained in Appendix E.

If these alternatives fail to fix the problem, your unit is malfunctioning. Repack it in the shipping carton and contact your 3Com representative for corrective action.

5.Once the self-test is successful, remove the loopback connector and continue with the installation procedure.

2 - 12 ONline Ethernet Bridge Module Installation and Operation Guide