Computer Not detecting Ethernet cable?

Daniel_38 · Dec 15, 2016

When i got home from work I realized that I was not connected to the internet even though my Ethernet cable was still connected to my tower and my internet is all online, I unplugged it then plugged it back in and my computer just wont recognize it at all. I've tried restarting PC and router no luck, anyone have any idea why this is happening all of a sudden?

Multipack · Dec 15, 2016

Did you try reinstalling LAN driver? No reason why it should suddenly stop working, but worth a try.

rhysiam · Dec 15, 2016

The Ethernet card, or your router, or both, should have a light to indicate whether a physical link is active on the port. That's the place to start.

If you have a light, then you have a physical link and you have a software or configuration issue.

If the light is off, and unpluggling/replugging the port makes no difference, then you have no physical link. Most likely the cable has died - or there's issue with the physical line between the devices.

Daniel_38 · Dec 15, 2016

Multipack :

Where would I go to do this?

Daniel_38 · Dec 15, 2016

rhysiam :

There is no light on either one, I've only had my pc and cable a few months it was working fine before...

Multipack · Dec 15, 2016

Daniel_38 :

What motherboard/system is it?

Daniel_38 · Dec 15, 2016

Multipack :

Not sure on the motherboard, my PC is an Alienware Aurora R5, Windows 10. Only got it in September.

ac13044 · Dec 15, 2016

what is the make of your motherboard go to there page and go to support download the lan drivers

Multipack · Dec 15, 2016

http://www.dell.com/support/home/uk/en/ukbsdt1/Drivers/DriversDetails?driverId=2PMF5&fileId=3546973920&osCode=WT64A&productCode=alienware-aurora-r5-desktop&languageCode=en&categoryId=NI

ac13044 · Dec 15, 2016

http://www.dell.com/support/home/us/en/04/product-support/product/alienware-aurora-r5-desktop/drivers/advanced

ac13044 · Dec 15, 2016

got to network then download the Killer E2400 Gigabit Ethernet Controller Driver

Daniel_38 · Dec 15, 2016

Multipack :

Downloaded that and tried to install but it says "No killer hardware detected" "You must have proper Killer hardware installed in order to install Killer Network Manager Suite".

Daniel_38 · Dec 15, 2016

ac13044 :

Thanks. Tried that but it says "No killer hardware detected" "You must have proper Killer hardware installed in order to install Killer Network Manager Suite". :??:

Multipack · Dec 15, 2016

Then its likely Windows updated the driver. You may need to uninstall your network driver first in Device Manager.

Try letting Dell fix it with diagnostics on the page ac13044 linked

ac13044 · Dec 15, 2016

go to device manager to see if the lan is installed

Daniel_38 · Dec 15, 2016

ac13044 :

Should this be right?

https://postimg.org/image/jsesg63g1/

Daniel_38 · Dec 15, 2016

Multipack :

I ran diagnostics all it did was install a video driver, I looked at device manager and this is the list of network adapters I have.

https://postimg.org/image/jsesg63g1/

Multipack · Dec 15, 2016

Try the diagnostics page and run modem and network checks http://www.dell.com/support/home/uk/en/ukbsdt1/product-support/product/alienware-aurora-r5-desktop/diagnose?os=wt64a

Is a weird issue

ac13044 · Dec 15, 2016

yea it is right doe it seems that there is no lan installed

Daniel_38 · Dec 15, 2016

Multipack :

Well good news and bad, I passed the test but still it wont pick up the Ethernet cable lol This is really strange

Daniel_38 · Dec 15, 2016

ac13044 :

FML... I found the LAN driver by clicking show hidden devices and uninstalled it now I cant re-install it for some effed up reason. It was something like Killer Network Gigabyte driver.

Multipack · Dec 15, 2016

Gigabyte?? Oh, you mean gigabit maybe? Why cant you install? What happens? Try restarting system first. Or running as admin.

It is a bizzare problem, but network diag is a specialist area. Am sure we'll get there lol.

ac13044 · Dec 16, 2016

yea download the killer lan driver again and right click run as admin

http://www.dell.com/support/home/us/en/04/product-support/product/alienware-aurora-r5-desktop/drivers/advanced

also should update your bios to not saying it is anything to do with network doe it could be a bug or glitch. updating software or bios improve security and address's problems and has new features as well

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