3Com 9400 manual Symptom Possible Sources of the Problem Steps to Take

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38CHAPTER 6: TROUBLESHOOTING THE SYSTEM

Table 7 Troubleshooting Power Failures

Symptom	Possible Sources of the Problem	Steps to Take
System does not power up.	■ System is not receiving power.	1	Verify that the building’s power outlet has power.
	■ Power supply malfunctioned.	2	Verify that the power cord is firmly plugged into the system and into the
			building’s power outlet.
		3	Try another power cable.
		4	If the system still does not operate, contact your network supplier or
			3Com Technical Support.

Table 8 Troubleshooting Abnormal System LED Activity

LED Status	Possible Sources of the Problem	Steps to Take
Fault LED blinks yellow.	Diagnostic software is not running.	1	Check the Administration Console display.
		2	Call your network supplier or 3Com Technical Support.

Power LED does not light. System has failed or power is not being

supplied.

1Shut down the system by disconnecting the power plug.

2Call your network supplier or 3Com Technical Support.

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Contents CoreBuilder United States Government Legends Japan Vcci Class a ComplianceAustralian EMC Frameworks Compliance Page Contents System Specifications For information on IntroductionFinding Specific Information in This Guide Icon Type Description ConventionsFor information on Turn to Convention DescriptionCoreBuilder 9400 Documentation Paper DocumentsSoftware and Documents on CD-ROM Documentation CommentsYear 2000 Compliance CoreBuilder 9400 Intelligent Switch System Features and BenefitsSystem Management Network Configuration ExampleSpeeding Up Server Access System Overview Front Panel 10BASE-TXSystem Overview Back Panel Back Panel of the CoreBuilder 9400 SystemSuperStackII Switch System Overview Sample ApplicationSystem and Setup Overview Qty To use Installing the System on a Table TopBefore You Begin Installing the System in a Distribution Rack Installing System Mounting BracketsFiber Safety Precautions Overview of CablingCabling Gigabit Ethernet Ports Guidelines for Gigabit Ethernet CablingCabling 1000BASE-SX Ports Cabling Gigabit Ethernet PortsSystem is powered on and running Cabling 1000BASE Gbic PortsSC connector cover Connecting the LX Transceiver to MMF When you cable Gbic transceivers, note that the SC Cabling the Console Port Console Port Pin Assignments Pin No Signal DescriptionCabling the Out-of-Band Management Port Male RJ-45 connector 10BASE-T cable System Power UP Power UpGigabit Ethernet Port Diagnostics Power-up DiagnosticsSystem Diagnostics Check Description Next Step Software ConfigurationSystem Checks SystemSystem Power UP Access Allows you to Using Mechanism About CoreBuilder 9400 System ManagementIP Management Interface Terminal ConnectionModem Connection Initial Management Access Changing the Console Port Baud SettingOut-of-band Management Configuring the IP InterfaceIn-band Management Getting Additional Help Diagnosing ProblemsPower Failures Abnormal LED ActivitySymptom Possible Sources of the Problem Steps to Take Diagnosing Problems LED Status Possible Sources of the Problem Steps to TakeCleaning Dirty Fiber Optic Ports and Connectors Power Supply Specifications Physical DimensionsSafety Agency Certifications Environmental RequirementsSnmp protocol RFC Software Tftp RFC InstallationStandard Type RFC/IEEE Supported MIB II RFCRemoving and Replacing the Power Supply Safety PrecautionsPower Supply Assembly Removal and Replacement AudienceRemoving and Replacing the Power Supplies Fan Tray Assembly Removal and Replacement Fan Tray Assembly Removal and ReplacementAppendix B FIELD-REPLACEABLE Units General Safety Requirements Wiring Closet RecommendationsSpace Requirements for the Rack Distribution Rack RequirementsProtective Grounding for the Rack Recommended Service Access Mechanical Requirements for the RackBuilding and Electrical Codes Building CodesNfpa Electrical CodesAppendix C Site Requirements and Safety Codes World Wide Web Site Online Technical Services3Com Knowledgebase Web Services 3Com FTP Site 3Com Bulletin Board Service3Com Facts Automated Fax Service Country Data Rate Telephone NumberSupport from Your Network Supplier Support from 3ComEurope Country Telephone Number Asia Pacific RimCountry Latin AmericaReturning Products for Repair Country Telephone Number Fax NumberAppendix D Technical Support Index NumbersIndex Recommendations World Wide Web WWW 50, 51 Index 3Com Corporation Limited Warranty CoreBuilder 9400 High-Availability SwitchWarranties Exclusive