For some reason, my digital freeview box has decided to lose BBC1 and BBC2. The signal comes as full strength when I click on the channel, then the screen goes blank, and a 'no signal' box appears, no other channels are effected. It seemed to start last week right after we had a bout of heavy rain and hail and I can still watch those channels in analogue mode. Aerial is new, fitted approx. 10 months ago and is pointing in the right direction, do you think I have a duff box?