3Com 3C17203 Getting Started Guide - Page 48
Solving Problems Indicated by LEDs, The Power LED does not light, On powering-up
UPC - 662705363738
View all 3Com 3C17203 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 48 highlights
48 CHAPTER 4: PROBLEM SOLVING Solving Problems Indicated by LEDs If the LEDs on the Switch indicate a problem, refer to the list of suggested solutions below. The Power LED does not light Check that the power cable is firmly connected to the Switch and to the supply outlet. If the connection is secure and there is still no power, you may have a faulty power cord or an internal fault. Firstly, check the power cord by: ■ testing it in another device ■ connecting a working power cord to the 'problem' device then contact your supplier for advice. On powering-up, the Power/Self Test LED lights yellow The Switch unit has failed its Power On Self Test (POST) because of an internal problem. The fault type will be indicated on the unit LEDs. Contact your supplier for advice. A link is connected and yet the Status LED for the port does not light Check that: ■ The Switch and the device at the other end of the link (or cable) are connected securely. ■ The devices at both ends of the link are powered-up ■ The quality of cable is satisfactory ■ Auto-negotiation settings are the same at both ends. Auto-negotiation problems will occur with 10BASE-T or 100BASE-T where auto-negotiation is disabled and incorrect cables are being used (cross-over or straight) Auto-negotiation problems will occur with fiber if: ■ The Receiver (RX) and Transceiver (TX) cable connectors are swapped ■ Fibers are broken ■ Auto-negotiation differs at either end (a link appears at the 'fixed' end and not at the auto-negotiation end)