Watching Freeview in our new property, I'm finding the picture quite badly affected by diagonal lines, usually blue, which are particularly noticeable on the black screen you get momentarily when changing channel. Solid blocks of colour (especially red) also display 'movement', i.e. they don't look solid at all. My leads are all decent quality and I don't recall this being an issue with the same kit in my last property. I can only assume it's one of two things: either it's noise in the electricity supply or the TV signal is too strong, which I've read can give a herringbone effect. Maybe what I'm calling diagonal is what a TV engineer would call herringbone. Has anyone else suffered this and if so did you find a solution? I'm loathe to spend a grand on an LCD TV until I've got this one sorted.