Network Problem - Happened Suddenly

T0M0

T0M0

T0M0

Associate
Joined
11 Feb 2010
Posts
109
Hi,

Hoping I can get some much needed help here.

My computer is failing to connect to the internet. It is saying there is no ethernet cable plugged into my computer when there is.

My computer has a wired connection to my router. The router is fine as I can hook up my laptop to it (both wired and wireless).

I have checked to see if its a faulty wire by testing the connection with two different ethernet cables, still no joy. I have also used the same ethernet cable to wire up my laptop to the router (connection worked) so I am sure its not a faulty wire.

Thus I believe it could be my computer?

I recently installed a second hard drive into it about 2 days ago, however it was working perfectly up until last night, when I switched it off for about three hours, I then went to turn it back on 3 hours later and thats when the connection problem arouse.

Any help would be much appreciated!

Its a Gigabyte GA-H55M-UD2H Intel H55 (Socket 1156) DDR3 microATX Motherboard that I have had since February.

Thanks in advance.
Tom
 
It sounds like your onboard or network card has gone.

You know you can connect with other PC's or laptops. This proves the router is ok and you do have a working internet connection. As you have said this means something is happening to that particular PC that cannot connect. You have tried different ethernet cables so that rules out the ethernet cable. If windows is still reporting the network cable is unplugged it means when you insert the ethernet cable it is not being recognised and to me that is something up with the network card or possibly the driver.

If you get network cable unpluged error message check if the PC can see the router.

I doubt you will be able to but try opening your router configuration pages or go to a DOS prompt and ping your router. If you can access the configuration pages or ping your router you know the PC and router are talking to each other. This means something else is stopping the internet connection on that PC.

If you cannot get your router configuration pages or ping the router then again to me it looks like your network card or drivers. Uninstall your network card and install the latest drivers.

If you still get the network cable unplugged error message it suggests to me your onboard LAN or network card has gone.
 
Last edited:
Agree with all the above, but have one more slight possibility. Some gig NICs get a little confused when trying to autodetect what speed they can run (usually related to the cabling) and just give up. Worth testing by manually forcing the link speed to 100Mb full duplex for the NIC properties in Win to see if it fixes the link.
 
Could try powering down the PC, unplugging, wait a minute then plug back in.

Most motherboards keep the LAN adaptor powered up even when the PC is shut down; that'd be the only way to (essentially) restart the adaptor. It's unlikely to work I admit, but it's a piece of cake to try.
 
maybe the motherboard reset itself. Check to make sure that the onboard nic is enabled in the bios. Sometimes my gigabyte motherboard resets bios settings. Otherwise it could be pins bent in the port itself or what other people have said above.
 
You must log in or register to reply here.
Back
Top Bottom