Hi all

We have a Freeview roof-mounted aerial which is then split five ways to different rooms in the house, terminating to PAL outlets. Reception is very good, but in one room I am having a problem that is annoying me. The room has a small Panasonic LED TV mounted on the wall, behind the TV are the power, Ethernet and PAL outlets. Initially, signal quality was fine but in the last couple of weeks it has degraded to the point where I am getting either 'No Signal' messages on screen, or just a bunch of garbled pixels. I took the TV off the wall and plugged it in to an outlet in another room to prove whether the PAL outlet was faulty. The signal was fine in the other room so I initially put it down to the outlet. But then I went back to the original room and tried it again while off of its mount, and signal was fine... after a bit of fiddling about I realised that the signal was being lost when the aerial cable between the PAL outlet and the TV crossed paths with a power cable. I replaced the aerial cable but the same thing happened. I then replaced the power lead (standard figure-8 lead) and still the same thing happened. Because of the way it's mounted and the position of the outlets relative to the TV it's almost impossible for them to not cross paths.

I'm stumped as to why this has only become a problem now when it was fine at first, and I'm also keen to hear if anyone has any advice? Is this normal? Can you buy baluns for aerial leads that might shield it from the interference from the power? 

Cheers

Steve