Can anyone give some advice on reducing a blocky freeview picture? I get picture break-up fairly frequently on ITV, ITV2 and on the music channels, but here is the catch: the picture quality is near perfect during the day, but terrible in the evenings. I suspect it could be due to electronics of a washing machine or central heating system. Perhaps some kind of power surge, but I doubt it. The freeview box (Echostar T101) says the picture quality etc are near 98%, and that certainly seems true during the day. I also have double shielded aerial cable at 75 ohms and a mast head filer/signal booster. Anyway, any thoughts would be appreciated.