I have catv in my house, the main tv in the living room has intererence so bad you can hardly stand it. It starts buzzing real loud but only on channel 7!!!!!!! and not all the time, it comes and goes. I have changed the cable to the tv from the jack, no help. I have also run another cable from another jack, no help. I have come to the conclusion that it could be the tv but how come only on one channel? It does not happen on any of the other tv's in the other rooms. Any ideas short of blowing this thing up!!!!!!!!