Great thanks for your help today
Welcome to the community and thanks for your posts!
Sorry for the problems you're having using your broadband. This is a strange one as you've mentioned the problems are introduced when removing the faceplate and connecting to the test socket.
We'll need to take a closer look at this for you to sort things out. Click on my username here >> RobbieMac << and you'll see our contact link on the left hand side underneath my profile picture.