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Question

Need Help - Intergrated NIC/LAN Card Not Working

May 11, 2020 10:12PM PDT

I have a Lenovo 720-18ICB Desktop (ideacentre) - Type 90HT. Recently the integrated network card is causing my modem to crash. CenturyLink has replaced 3 modems in the last 30 days and it all traces back to my computer. The minute we plug the computer into the router I lose all internet and wifi, as soon as I unplug it I get internet back. Is there a way to disable the integrated network card and install a separate pci network/wifi card? If so do I need to disable the onboard NIC/LAN card?

Discussion is locked

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Answer
Well there are reasons to crash with good hardware.
May 12, 2020 12:25AM PDT

Let's say someone set the PC's IP address to the same as the router. You can crash a network if you do that.

Example: Router is at 192.168.1.1. PC is also set to 192.168.1.1. Crash!

At this point I can't tell you it's hardware.

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New card
May 12, 2020 6:16AM PDT

If I install a pic nic card will that overwrite the integrated one?

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You can't overwrite hardware.
May 12, 2020 8:57AM PDT

Thank you Kees for that nugget.

If the scenario I noted is in play then the new network card if you used the settings I noted would crash the network as well.

So while getting another card is a good idea it won't fix it if the settings I noted are in play.

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How can I check
May 12, 2020 9:42AM PDT

How do I check to see if they are sharing the same IP address?

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Re: same IP-address
May 12, 2020 10:50AM PDT

They don't until you explicitely set it yourself. Don't do that.

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I've lost count of how many times...
May 12, 2020 10:58AM PDT

That the user sets the IP manually. I can't guess why they do that and often the story goes on with "it worked OK till I...."

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Since how depends on the operating system.
May 12, 2020 10:56AM PDT

I'll write about Linux. In Linux I'd boot up, log in, pull up a root command line and type:

ifconfig -a

That would show all the information which the set IP address would be there.

Be sure to supply enough detail so I don't guess badly at what Operating System is in use.