Black Box LRA2900A manual Introduction, Symptoms, Problem, Corrective Action

5 • Troubleshooting and maintenance Model LRA2900A RAS Getting Started Guide

Introduction

This chapter describes troubleshooting and fault analysis that can be performed by the operator. If you require more help, contact Black Box technical support at 724-746-5500. Refer to table 4 for a list of common symp- toms and suggested remedies.

Note The following information assumes that there is only one failure involving the RAS and that if you perform the corrective action listed, it will solve the problem.

	Table 4. Symptoms
Problem	Corrective Action
POWER LED is extinguished	Verify that power is being supplied to the RAS.
POWER LED is flashing	One of the power supplies has malfunctioned. The RAS will function nor-
	mally indefinitely with one power supply, so you can wait until a low traf-
	fic time, then refer to “Replacing the RAS” on page 58 to replace the
	RAS.
CPU FAIL LED is lit	CPU has failed. As soon as possible, unplug both power cables from the
	RAS, wait 30 seconds, then plug the cables back into the RAS to see if
	the problem disappears. If the CPU FAIL LED is still lit after the RAS com-
	pletes the power-up cycle, refer to “Replacing the RAS” on page 58 to
	replace the RAS.
ALARM LED is lit	Indicates that an alarm condition has been detected.
SYSTEM LED is extinguished	The RAS is not functioning properly. As soon as possible, unplug both
	power cables from the RAS, wait 30 seconds, then plug the cables back
	into the RAS to see if the problem disappears. If the SYSTEM LED is still lit
	after the RAS completes the power-up cycle, refer to “Replacing the RAS”
	on page 58 to replace the RAS.
10/100 ETHERNET yellow LED is	• A valid link has not been detected. Verify that the cable is plugged
extinguished	into the hub, switch, or workstation and the RAS.
	• Verify that the hub, switch, or workstation is powered on.
	• Replace the cable. If the problem still exists, refer to “Replacing the
	RAS” on page 58 to replace the RAS. If the problem still exists, trou-
	bleshoot the hub, switch, or workstation.

55 Introduction