I have had my 40ex503 since may. I love it. Just after Christmas I placed a top up tv cam and card in the slot on the left of the tv. Then within a day or so it was no longer picking up the 4 freeview hd channels. I thought my aerial was needing replacing so today I paid 95 quid for a new one. However the hd channels were still not there. I took out the cam and the freeviewhd channels were back. I think I may have just wasted 95 quid. Why does the cam do this?