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I have just reinstalled Windows 10 on a Lenovo desktop but I cannot get the wired internet connection to work. I have it connected to a TP-Link TL-SG108 switch to which I have other machines connected too, and they do work. Wifi works on the Lenovo, and even the ethernet did work once after the new installation but after a restart it just won't connect again. Doing ipconfig /renew results in "Unable to contact your DHCP server". I've tried reinstalling the network card, and most other advices I find on Google but without any luck.

This is what the ipconfig looks like right now:

ipconfig

Any help forward is appreciated!

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  • Is the machine connected to a device that is acting like a DHCP server (i.e. AD Domain Server or a network router)?
    – Ramhound
    Commented Oct 5, 2021 at 18:29
  • The machine is connected to a network switch which in turn is connected to the fiber modem/router (whetever it's called) which comes from my internet provider. To the network switch I also have connected a wifi router and an apple TV, both works fine. I have made no config changes to the network switch (if that's even possible)
    – jola
    Commented Oct 5, 2021 at 18:36
  • Sounds like a configuration issue if the machine cannot communicate with the DHCP server on the router.
    – Ramhound
    Commented Oct 5, 2021 at 18:37
  • If you manually configure the ip settings on the wired interface is it able to get on the internet? If yes the problem is on the DHCP server. If not the problem is on the switch or the wiring.
    – Tonny
    Commented Oct 5, 2021 at 18:46
  • I have not tried that since I'm not sure how it's done, but I'll give it a try.
    – jola
    Commented Oct 5, 2021 at 18:52

1 Answer 1

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This sounds like a broken cable, broken switch port or misconfigured wifi router. Move your network cable from the wifi router to your PC to check it.

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