A friend of mine has had their tv put on their wall by their plasterer but he concealed the wires in the wall and plastered over it. The picture quality is crap and he used the cheapest cables he could find, even the plug socket is concealed and there is no way of getting to it which means the tv cant be disconnected. Does this sound the right way to mount a tv on the wall or would it have been better to make a stud partition wall in the shape of a chimney breast so the plugs could be accessed via a door/hatch?