Hi, Welcome to our community. Please let us know the following, 1. Were there any hardware or software changes made to the system2. Please check the network icon on the bottom right of the screen, does it have a redx/ exclamation mark?3. We also suggest you to right click on the network icon and click on troubleshoot problems. Share the outcome/ error messages.4. Do you see any physical damage on the ethernet port?5. Have you tried an alternate ethernet cable?
I am running windows 7 home on my Dell XPS 8700.  The ethernet port has worked until recently and now I only get access wirelessly,  I am plugged directly into my router that is also plugged directly in to a ROKU which works fine, so I assume it is the PC that is not working.  I looked for an ethernet item in the device manager but cannot see anything there.  Where would it appear?  I also downloaded some updates recently.  Perhaps I need to restore to an earlier date?  Any advice
Ethernet port stopped working