We have had a JVC AV-48WP30 for about 7 years, GREAT TV, recently we've developed red streaks from top to bottom, Techs showed my wife a unit near back panel right behind the place the cables attach, it's perpendicular to the panel, IF you move it side to side OR hold it down hard the lines go away, is this a common problem? Could it be the 'rail' that the unit is plugged into or the contacts within that rail??