Black Box LB9017A-R2 No Power to the Switch, Possible Problem Solution, Possible Solution Problem

Express Ethernet Switch

Trouble-shooting Guide

This trouble -shooting guide describes problems that could occur with the Express Ethernet Switch. The guide states possible reasons for the problems, and possible steps to take to solve the problems.

No Power to the Switch.

Symptom: Power cord is connected to the switch, but all LEDs, including the Power LED, are off.

Possible Problem

Solution

Loose power connection or faulty power supply

1.Check both ends of the power cord to make certain that they are securely connected to the power receptacle on the switch and to the power outlet.

2.Verify that the power outlet has power.

No Connectivity to the Data Terminal Equipment.

Symptom: An Ethernet switch cannot communicate to the directly connected computers or network segments.

Possible	Solution
Problem
	1.	Check cables for a secure connection.
	2.	Verify that the correct type of cable is in use.
	??	For connection to a PC or a network interface card (NIC), use a straight-through cable.
	??	For uplink to another switch or hub, use a cross-wire cable, or use a regular straight-through cable connected
Incorrect or faulty		to the uplink port with the uplink button activated.
		Refer to Table 9 for cable specifications.
cabling	??
	1. Verify proper cable preparation.
	2. Use a time domain reflectometer (TDR) or other cable-checking device to verify that the cable has no opens,
		shorts, or other problems.
	3. Swap the cable with another of the same kind to see if the cable is bad.
	??	Replace or fix the faulty cable as necessary.
Dysfunctional NIC	Run the diagnostic supplied by the vendor on the NIC to determine if it is functioning properly. If it is not, replace
on a PC or	it.
workstation
Packet Overflow or	Reset the switch by pressing the reset button or turn the switch off, then on again.
Hardware problem

No Connectivity to Certain Nodes on the Network

Symptom: Data terminal equipment (DTE) connected to the switch can not send or receive information from certain segments on the same network or across to another LAN or WAN.

Possible

Problem

Hardware problem

Solution

Check for a damaged RJ-45 jack, or fiber SC or ST type connector.

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