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Cant connect to internet via Ethernet Cable

Last response: in Networking
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May 5, 2013 10:12:11 PM

I just finished building my friends PC and i found out that i cant connect to the internet. When i plug the Ethernet Cable into the port at the back, the light turns orange.
May 5, 2013 11:53:17 PM


Hello and welcome to Tom's Hardware Forums.

At least the light shows the NIC is alive - perhaps it just lacks a driver. Have you checked in Device Manager to see if it has a yellow mark beside it?

If it has, go back to Device Manager and scroll to Network Adapters. The ethernet will be in there so right click it, go to Properties and then click the Details tab. Scroll to HardwareIDs and take a note of the four characters which follow VEN for Vendor and also the four following DEV for Device.

Go to http://www.pcidatabase.com and input those characters in the two relevant boxes and follow the trail to the right driver. When you find the list of the Vendor's drivers, they aren't in order so use your browser's Find facility to track the Device details. With luck you'll have an executable file but some will be a zipped folder. Either way, transfer it to the affected system and install it.

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May 6, 2013 9:09:37 AM

Yes try Saga's idea. If that doesn't work then check your Ethernet settings. I doubt this is the case since you just built the computer but if you have the wrong static ip credentials like the default gateway or used an ip address too far out of your router's default range then that may be an issue as well.
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May 6, 2013 12:40:10 PM

The yellow light shows an active connection, right? If the green LED is blinking it does. If not then there are four wires, one of those could be disconnected and the amber light will still be lit.

Trust me, a cable tester that shows 1 to 1 mapping can resolve this in a second....And yes I've seen bad wires from Netgear and LinkSys right out of thier freshly opened packages.

Try the wire to verify it works.......Always start with the simple stuff first

Is the NIC a Gigabit one? And the switch a 10M, check the duplex speed....
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May 6, 2013 1:13:41 PM

Beachnative said:
The yellow light shows an active connection, right? If the green LED is blinking it does. If not then there are four wires, one of those could be disconnected and the amber light will still be lit.

Trust me, a cable tester that shows 1 to 1 mapping can resolve this in a second....And yes I've seen bad wires from Netgear and LinkSys right out of thier freshly opened packages.

Try the wire to verify it works.......Always start with the simple stuff first

Is the NIC a Gigabit one? And the switch a 10M, check the duplex speed....


Wouldn't the duplex speeds not really be an issue here. Assuming he's using somewhat modern technology his pc would be compatible with base 10-base100.
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May 6, 2013 2:24:41 PM

Duplex speeds can be affected by EMI.

As noise is increased the duplex speed must decrease. You do the same thing with distance. 10M will run frther than 100M
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