Solved Why is my computer not registering an ethernet conncetion?

January 11, 2019 at 13:12:56
Specs: Windows 10
Hello. So when I boot my computer it states "Not connected- No connections available". It's not registering that an ethernet cable has been plugged in. I've tried updating and uninstalling the network adapters, cycling through the ports on the router and have tested my ethernet cable with my laptop which connects with no issue. The light on the back of the router is on when plugged into the laptop but not the desktop. Any advice on how to advance?

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#1
January 11, 2019 at 14:13:42
If the lights next to the Ethernet port on your computer aren't lighting up, it means it's not seeing that it's plugged into the router. Try a different cable.

Also, look at the ports on the computer and router and make sure none of the pins are bent or broken.

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#2
January 11, 2019 at 14:21:13

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#3
January 11, 2019 at 15:16:15
✔ Best Answer
1- Restart the computer and router. (never ignore the simplest possibility)
2- Try a different Ethernet cable.
3- Download the drivers (chipset and network) from the system mfg's site (or motherboard mfg's site if custom) and install them.
4- Disable the onboard NIC and install a PCIe (or PCI on older machines) NIC card and its driver.

You have to be a little bit crazy to keep you from going insane.


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#4
January 11, 2019 at 17:34:08
I've now painstakingly run through these responses and unfortunately the situation has not changed, I've tried several different ethernet cables so I know that that is not the issue, the ports on the router do work, I've tested them against other devices, the drivers have all been fully updated and still no change in status.

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#5
January 11, 2019 at 17:52:23
Update: Testing the ethernet connection through my router does not display that any ethernet cable is connected or open with the exception of when I connect it to my laptop.

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#6
January 11, 2019 at 21:12:14
IF you did the first three of the steps I outlined, you pretty much determined that the NIC on your motherboard if burned out, possibly from a power surge through the ethernet cable. In this case you need to do step four as the only way to resolve this. An add on NIC card is not expensive and will take less time to install and set up than all of the time spent so far figuring out what was wrong.
I once 'temporarily' moved the internet cable (from cable TV splitter) from going through my UPS' surge protection to test if it was somehow slowing down the connection (not the case) and forgot to re-route it back through the protection. One evening the neighbor's house was struck by lightning via an old unused TV antenna on their chimney. The top of the chimney blew off at the straps around the chimney supporting the antenna but a surge went up through their Cable TV line back to the pole and into my home. The cable TV box, the cable modem, my router, and every NIC card on 3 or 4 computers was fried. The cable company replaced their hardware but I had to purchase a new router and put new NIC cards into all of the desktop computers and get a USB/NIC dongle for the laptop that was also plugged in.
It is possible that a power surge or other event burned out your NIC card which the first steps were designed to test for.

You have to be a little bit crazy to keep you from going insane.


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#7
January 12, 2019 at 13:32:40
Installed a new NIC card and we are online with no issues, upset that I had to spend the money but I truly appreciate the help and patience. Thank you for the solution

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#8
January 12, 2019 at 21:27:26
Sometimes spending $20. is much easier than racking your brain hour after hour as long as it works right after that.
Thanks for getting back to us and you are welcome..

You have to be a little bit crazy to keep you from going insane.


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