3Com SuperStackII Switch 3900 Quick Installation Manual page 8

8 Quick Installation Guide
Solve
Problems
9
This section explains how to identify and correct system problems and
suggests some things that you can do if you cannot resolve a problem.
Symptom
Power failure
System does not power up.
LED Status
Power LED does not light.
Fault LED blinks yellow.
Possible Sources of Problem and Steps to Take
Possible sources of problem:
System is not receiving power.
Power supply has malfunctioned.
Recommended actions:
1 Verify that the building's power outlet has power.
2 Check that the power cord is firmly inserted into
the system and into the building's power outlet.
3 If you are using an RPS or UPS, check that it is
firmly plugged into the building's power outlet.
4 Try another power cable, RPS, or UPS.
5 If the system still does not operate, remove the
power cord from the system and contact your
network supplier or 3Com Technical Support.
Possible Sources of Problem and Steps to Take
Possible source of problem:
System failure
Recommended actions:
1 Shut down the system by removing the power
cord.
2 Contact your network supplier or 3Com Technical
Support.
Possible source of problem:
Diagnostic software is not running.
Recommended actions:
1 Check the Administration Console display for
diagnostic messages.
2 Contact your network supplier or 3Com Technical
Support.