Ethernet Cable no longer recognized.

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Akilae0

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Jul 27, 2014
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I've tried resetting the BIOS and CMOS, removing and re-installing drivers, and I have checked to make sure the cable itself is working (works fine on my laptop).

It worked just fine last week then I came back from vacation and it will not recognize that there is a cable plugged in.

I'm running Windows 7 home premium and I have an Asrock z68 extreme3 gen3 motherboard. If you need any more information let me know, any help would be appreciated.

UPDATE: Oddly, when I unplugged the ethernet cable again, it attempted to search for wireless networks (this desktop contains no wireless networking card). I was also defragging at the time so I'm not sure if that affected anything.
 
Solution
hans_pcguy
Does the Ethernet show up in the device manager? If you did not change/move anything and just came home and now it doesn't work, it COULD have sustained a power surge through the network wiring and blown out the Ethernet controller on your motherboard. You could try uninstalling and reinstalling the controller in the device manager. If that doesn't work you can get a pci or pcie ethernet card for cheap money (under $20)and stick it in. There was a time when onboard ethernet and sound chips were going all the time and very common for people to add cards when they went out. It doesn't happen that much anymore.
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hans_pcguy

hans_pcguy

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Nov 13, 2010
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Does the Ethernet show up in the device manager? If you did not change/move anything and just came home and now it doesn't work, it COULD have sustained a power surge through the network wiring and blown out the Ethernet controller on your motherboard. You could try uninstalling and reinstalling the controller in the device manager. If that doesn't work you can get a pci or pcie ethernet card for cheap money (under $20)and stick it in. There was a time when onboard ethernet and sound chips were going all the time and very common for people to add cards when they went out. It doesn't happen that much anymore.
 
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Solution
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Akilae0

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Jul 27, 2014
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I've tried three cables so far. All of them work with my laptop, but my desktop doesn't seem to register them.
 
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Akilae0

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Jul 27, 2014
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I unplugged the surge protector that my computer was plugged into before leaving, but it couldn't hurt to try that solution. And I don't believe Ethernet is showing up under the device manager.
 
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Akilae0

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Jul 27, 2014
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Well, I'm not really sure what happened. I cleared the CMOS for the fifth or sixth time on a whim and it decided to start working again. Thanks for all of the answers, everyone.
 
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westom

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Never start fixing things 'on a whim'. That is how to exponentially complicate a problem.

This is why the fewer and better manufacturers provide hardware diagnostics. The diagnostic would have said what parts are good and what hardware is bad - without doubt. And without complications that might be generated by the OS.

Lights on an ethernet port and on the attached routers are another first thing to observe. They report if a computer's NIC is talking to the router's computer at a most primitive level. That information also would have been useful especially before you tried to fix (change) anything.



 
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