I have a home made 19" monitor made up of a 19" Daewoo TV Tube and a Wey Ya Chassis. Picture looks great in the horizontal position. When I rotate it to the vertical position the far upper right looks like I am getting interference like from a magnet but I have nothing with in 6'-8' of it. When I install it in the cabinet fully back in position with a slight upward facing angle the spot now show on the top left side about the size of a soft ball. Other then the spot the picture is great. Any ideas?
Thanks
Walter
Thanks
Walter