powerline av 500 stopped working

Hello, i have been using my powerline av 500 for 6 months now, never had a problem.

All of a sudden today one of my pcs lost connection, so i do what i usually do and unplug/plug back the ethernet cable to my pc.

This did not however fix the connection, and it keeps connecting to a public network because i guess it cannot find my home network.

I have pressed the security  button on both devices (my pc's and the one of the router) yet i still cannot connect.

When i plug an ethernet cable directly from my router to the pc it works (so its not the ethernet card malfuncitoning).

Can anyone help me with this?