No Internet Connection Via Ethernet When Plugged Into Router. Assistance Appreciated.

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JackTud

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Feb 4, 2015
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Previously I had the Ethernet cable (Has no specifications on it, so I can't tell if it's Cat5 or Cat5e) hanging from holes I burrowed through the ceiling, being unsightly I was requested to run the Ethernet cord through available electrical pipping. The router is located in the front room of my house and my tower is located in my bedroom which are practically next to each other. After cutting off and replacing one end of the wire due to a tight fit in the pipes, I found that I could no longer access the internet, my computer would not even register that I had an Ethernet cord plugged in.

So instinctively I assumed there was an error on my half and replaced the end again, this time ensuring the wire code was in the correct order, there was no kinks or cuts in the wire and that it was properly secured in the head. Still no internet; so I proceeded to run a few test:

  • ■ With a laptop, Wi-Fi disabled, I plugged the same Ethernet cord in and the laptop could not access the internet either.
    ■ Tried different ports on the router, even though devices previously plugged into those ports had no issues; apple tv, HD Cable Box etc. Still nothing...
    ■ I moved my tower right next to the router and used an extra, shorter (Original Ethernet Cord - 60ft, Spare test cord - 40ft) Ethernet cable I had and it still refused to connect.
    ■ I reset the router to factory settings twice and made sure the LAN driver specifically and all other drivers were installed, updated and working for my mobo; I checked the Device manager as well and everything seemed to be fine.
    ■ But the internet works fine if I connect the original Ethernet cord directly into the Modem or I if I use a really short cord, 5ft - 10 ft; which creates obvious problems.
I noticed if I plug it in after leaving it out for awhile the lights by the Ethernet port on my computer will flash for a few seconds and the network icon on the taskbar with react like it is attempting to connect but will inevitably display as no connection. After experimenting and failing, I got a USB wifi adapter which is working for the time being but is a little irritating when I am gaming so I would like to resolve this if possible, assistance is appreciated.

I am using a Linksys Wi-Fi E1200 Router, running Windows 7 Ultimate x64. I am still a nooblet when it comes to certain things so...


 
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arossetti

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Feb 22, 2013
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Not sure if I understand everything here....

You ran Ethernet through an electrical pipping? Do you mean a conduit with other live wires? And you don't know what type of cable - UTP or STP, 5 or 5e?

You should never run Ethernet that close next to or bundled with electrical wiring. You'll get cross talk and no signal. If you have to run it near then you should use STP - Shielded Twisted Pair. That could be the problem.

Of course your NIC is going to blink when you plug it in. It's trying to negotiate the proper protocols. Obviously it is failing. Considering that you reconnected/wired the RJ-45 connector - What standard did you use? T586A or T586B? If one end is configured for A and the other for B - Total Fail. That could be a problem.

Recheck what you did. I'm thinking operator error.
 
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JackTud

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Feb 4, 2015
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But I also used a 40ft wire which I had on the floor and the original Ethernet cord isn't in a conduit with Electrical wiring but telephone wires etc. I don't know if crosstalk still applies then or not. I used T586B on both ends of the original Ethernet cord and all cords I used as test or controls and there are no specifications on the wire so I cannot determine which type it is.

 
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arossetti

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Feb 22, 2013
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So you get connection with a short cable but not a long one.... Could be bad cables but two not working? How old are the cables? Their type should be on the outer cladding. If you're trying to push Gigabit speeds over Cat 5 that could be part of the problem. If it's UTP and there's EMI that could also be it. Also check your CMOS to make sure your NIC is set up correctly but since you are able to connect using the shorter cable, I'm guessing it is.
 
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GhislainG

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Jul 16, 2008
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Open Network and Sharing Center, Change adapter settings, double-click the Ethernet controller, click Properties, Configure, Advanced tab, scroll down to Speed & Duplex and change the value from Auto Negotiation to 100 Mbps Full-Duplex.

You used T-586B connectors and the correct crimping tool? Both ends use a T-586B connector and the wiring matches the color scheme at http://www.cableorganizer.com/articles/difference-between-T568A-and-T568B.html? In particular make sure there is no mistake on the pair of wires connected to pins 3 and 6.
 
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JackTud

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Feb 4, 2015
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Unless there is something I missed then both sides are T568B and I used the correct crimping tool as well as changed my connection speed to 100 Mbps and it still isn't connecting.

 
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