5 • Troubleshooting and maintenance
Model LRA2900A RAS Getting Started Guide
55
Introduction
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
extinguished
•
A valid link has not been detected. Verify that the cable is plugged
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.