@ Admin, OK super Thanks.
I have NOT changed any MAC Id's..NO
As far as the Network and Router resets are concerned, when ever I get a Network problem on any of my Bxes, I automatically run a self diagnostic.
Switch and Power OFF all Boxes.
Switch OFF and unPLug Router for at least 10 mins so it can unload/discharge itself.
Then I switch the Router back ON and the Receivers one by one as well, normally this cures any Network connections.

regards.AJP