Allied Telesis AT-9424T/POE, AT-9408LC/SP manual Power LED is Off

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Chapter 3: Troubleshooting

Power LED is Off

Check the PWR LED on the front of the switch. If the LED is off, indicating that the unit is not receiving power, do the following:

Make sure the power cord is securely connected to the power source and to the AC connector on the back panel of the switch.

Verify that the power outlet has power by connecting another device to it.

Try connecting the unit to another power source.

Try using a different power cord.

Check that the voltage from the power source is within the required levels for your region.

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Contents Installation Guide Page Electrical Safety and Emissions Standards Translated Safety Statements Contents Page Preface Product Documentation Where to Go First Starting a Management Session Safety Symbols Used in this Document Symbol Meaning DescriptionWhere to Find Web-based Guides Management Software Updates Contacting Allied TelesisPreface Overview ChapterOverview AT-9408LC/SP Switch DescriptionsAT-9424T/GB Switch Shows the front and back panels of the AT-9424T/GB SwitchAT-9424T/SP Switch 10/100/1000Base-T Ports Port and SFP System Slot LEDsShows the front and back panels of the AT-9424T Switch AT-9424T/POE Switch 10/100/1000Base-T POE Ports Port and SFP System Slot LEDsAT-9424Ts Switch Shows the front and back panels of the AT-9424Ts SwitchAT-9424Ts/XP Switch SFP Slots XFP SlotsAT-9448T/SP Switch 10/100/1000Base-T Ports Card SlotAT-9448Ts/XP Switch Compact Flash 10/100/1000Base-T Ports Card SlotConnector Type Speed Duplex Mode 10/100/1000Base-T Twisted Pair PortsCable Type Auto-MDI/ MDI-X Port Pinouts Maximum DistanceConnector Type Speed Maximum Distance Cabling Fiber Optic PortsGbic Transceiver Slots Gbic TransceiverSFP Transceiver Slots Illustrates an SFP transceiverXFP Transceiver Slots Shows an example of an XFP transceiverRedundant Twisted Pair Ports Model Ports and SlotsAT-9400 Series Gigabit Ethernet Switches Installation Guide Compact Flash Card Slot Function State Description Port LEDs10/100/1000Base- T Twisted Pair Port LEDs Fiber Optic Port Transceiver Slot LEDs System LEDs State DescriptionStack LEDs MstrStack Installation Guide Expansion SlotTerminal Port Power Over Ethernet Minimum Power Maximum Power Class AT-RPS3204 Redundant Power Supply AC Power Connector Installing the Switch Reviewing Safety Precautions AT-9400 Series Gigabit Ethernet Switches Installation Guide Installing the Switch Selecting a Site Speed Cable Type Twisted Pair and Fiber Optic Cable SpecificationsMaximum Fiber Optic Cable Specifications Cable Type Maximum OperatingUnpacking the Switch Installing the Power Cord Retaining Clip AC Switches Only Inserting the Retaining Clip into the Retaining BracketInstalling the Switch in a Rack Attaching Rack-Mount BracketsMounting the Switch in a Rack Installing Optional Transceivers Installing a Gbic TransceiverInstalling an SFP Transceiver SFP Handle Installing an XFP Transceiver Installing an XFP TransceiverInstalling the Switch Cabling the Twisted Pair or Fiber Optic Ports Applying AC Power Connecting the AC Power Cord240VAC Starting a Local Management Session 9408 AT-9400 Series Gigabit Ethernet Switches Installation Guide Warranty Registration Troubleshooting Power LED is Off Twisted Pair Port Link LED is Off Fiber Optic Port Link LED is Off Transceiver is Installed but the Status is Not Present System Fault LED is Blinking System Fault LED is Steadily On Cannot Establish a Local Out-of-Band Management Session Switch Functions Intermittently Troubleshooting Appendix a Physical SpecificationsAT-9400 Series Dimensions H x W x D Switch Environmental Specifications AT-9400 Series Weight SwitchPower Specifications CertificationsPin Signal RJ-45 Twisted Pair Port PinoutsPinout Pair AT-9408LC/SP Switch 1000Base-SX Port Specifications Property ValueRPS 21-pin D-combo Port and Connector Pinouts RJ-45 Style Serial Terminal Port PinoutsPin Definition