3Com SuperStack 3 4400 SE 3C17206 Getting Started Manual

Also see for 3C17204: Datasheet Getting started guide Getting started guide Getting started guide Implementation guide

Contents

3Com SuperStack 3 4400 SE 3C17206 Getting Started Manual Manual pdf 58 page image

58 CHAPTER 4: P ROBLEM SOLVINGSolving ProblemsIndicated by LEDsIf the LEDs on the Switch indicate a problem, refer to the list of suggestedsolutions below.The Power LED does not lightCheck that the power cable is firmly connected to the Switch and to thesupply outlet. If the connection is secure and there is still no power, youmay have a faulty power cord or an internal fault. Firstly, check the powercord by:■ testing it in another device■ connecting a working power cord to the ‘problem’ devicethen contact your supplier for advice.On powering-up, the Power/Self Test LED lights yellowEither:■ The Switch unit has failed its Power On Self Test (POST) because of aninternal problem. The fault type will be indicated on the unit LEDs.Contact your supplier for advice.or■ A port has failed and has been automatically disabled. You can verifythis by checking that the Port Status LED is quickly flashing Yellow. If aport fails the Switch passes its Power On Self Test and continues tooperate normally.A Port Status LED is quickly flashing yellowThe port has failed and has been automatically disabled. The Switchpasses its Power On Self Test and continues to operate normally, even ifone or more ports are disabled.A link is connected and yet the Status LED for the port does notlightCheck that:■ The Switch and the device at the other end of the link (or cable) areconnected securely.■ The devices at both ends of the link are powered-up■ The quality of cable is satisfactoryDUA1720-3AAA07.book Page 58 Wednesday, March 17, 2004 1:14 PM