A question for your question... Has your port exhibited this behaviour since new, or is this a recent development?

**Edit**

Since this problem started after you purchased the machine, it was most likely caused by something getting into the port, or by a physical deformity of the case or connector housing itself. If you can't see anything stuck inside the port, look to see if it is bent/broken anywhere around the edge (mainly right at the top where the cable's clip connects).

If cables aren't fitting into the port anymore, my workaround would be to make sure you have a cable with lots of slack, and remove the clip that holds it in place. Generally if there is no tension, an ethernet cable will stay in the port without the clip.

Plug may be deformed around, or have something in, the recess for the tang.

N.

Might want to check the metal wire contacts inside the jack to make sure each one is in its proper channel. I know with a phone jack, I've had those metal contacts get bent and keep the phone plug from going in properly.

It happens with me too. It's just unproperly shaped cable or port. Seeing that you're getting the same problem with different cables, it indicates a problem in your jack's shape.

Try inserting modeling clay in the port and comparing the shape that comes out with the shape of the connector. Then maybe you could remove the excess part.

Hi! Sometimes I've found that the little plastic tab on the top of the connector goes "soft" and does not have enough bounce to get high enough to latch inside the port. If you carefully pull that plastic strip upward, making sure not to break it off, this can re-establish its position so that hopefully when you plug it in again, it will rest in the proper position to click inside the port. Of course, if you've tried multiple cables with the same result, it may not be this at all and may be something inside the port.