My 42phd8 pana has developed a very irritating problem. When watching program material i.e dvds or freeview channels where black brs are present top and bottom the top bar seem to be affected by the colour of the surrounding image. Most of the time the "black" bar at the top takes on a strong tinge of red pixelation across the screen left to right or sometimes flashing reddish effect. This is really obvious as this should remain black. The bottom bar remains black and stable. This looks like a fault to me! Any ideas?