Computer doesn't recognise ethernet cable

[Tim_61]

Hi,

First of all, I will donate my last shirt to this site if anyone is able to help me with my problem!

I've now been trying to fix my computer for over a week, reading dozens of forum posts on the issue, replacing things, but all with now luck 🙁

So here is my problem, (I'm running Windows 7) around 10 days ago when I switched on my computer I noticed that I didn't have an internet connection, after inspecting the router I noticed that it was simply dead (everything else was fine, there wasn't a power surge, lightning etc.). After replacing the router I noticed that my onboard network controller (Marvell Yukon 88E8056 PCI-E Gigabit Ethernet Controller) wouldn't recognise any ethernet cable plugged into it. There is two ports and both of them are showing up in the device manager and network settings as working fine. I also went into my PC's Bios to confirm that both ports are enabled.

I have tried numerous fixes, like updating the driver/firmware, uninstalling/re-installing drivers, disable/enable. All without success.

Where it gets really odd, last weekend I decided to purchase a new network card, assuming that the ports might be faulty, however the exact same problem still exists.

Now one strange note, sometimes when switching on the computer the router will briefly have the port led, into which the ethernet cable is plugged into, flash up, and at the same time it will show in the Network Connections as connected on the Local Area Connection. This will only last for about a second and then keeps repeating.

Any help will be highly appreciated!

 

[techgeek]

As Joe Porter stated, have you tried to uninstall the last updates via Programs and Features. If you think it might have been the latest Windows Updates that bunged up your computer, maybe uninstalling them will undo it.

 

[Tim_61]

Can you go on programs and features, view installed updates and uninstall the updates on that date from there. If that solves it you can then install the updates one by one to see which one caused the issue.

oops sorry, almost missed your post. trying this now...

 

[Tim_61]

As Joe Porter stated, have you tried to uninstall the last updates via Programs and Features. If you think it might have been the latest Windows Updates that bunged up your computer, maybe uninstalling them will undo it.

I've uninstalled all windows updates that have been installed since the last windows update and problem still exists 🙁

Any other ideas?

 

[techgeek]

Well I've got an idea to help eliminate the the OS as the problem, although it requires that you have a spare internal HDD.

If you do, you could disconnect your present drive and install Windows on the spare drive. Install the drivers for your ethernet if Windows doesn't have them and see if it works. This way if your onboard NIC"s still don't work on a fresh install of Windows, you haven't wasted a bunch of time backing up data, installing Windows and then not have anything to show for it. Of course you are still having to install Windows, but if your NIC's still don't work, then you don't have to re-install your other software (which is what really takes the time) as well.

 

[Tim_61]

OK, I've just solved my problem! Issue was with the replacement router! Hard to believe, but after figuring out that the same issue exists on another computer with this "new" router, I decided to by a new one and it fixed the problem.

Thanks so much techgeek and Joe Porter! Really appreciate you help on this.

 

[techgeek]

My gut is telling me this is a problem with Windows because your new NIC doesn't work either. That or it's your new router / modem. Do you have any other computers connected to this router / modem via ethernet that do get an internet connection?

So you were able to get another computer connected to the router. That's awesome. Last night you didn't have another one to try. It was something I mentioned as a possibility.

 

[Tim_61]

My gut is telling me this is a problem with Windows because your new NIC doesn't work either. That or it's your new router / modem. Do you have any other computers connected to this router / modem via ethernet that do get an internet connection?

So you were able to get another computer connected to the router. That's awesome. Last night you didn't have another one to try. It was something I mentioned as a possibility.

Yup, I managed to get my hands on an old dell pc and got it back up and running and the drop outs in the network settings were exactly in sync on both pc's after having both plugged into the router.

Thanks again mate!

 

[Plumboby]

router is stuffed

 

[Plumboby]

get a new modem router