I have a 32" 4:3 aspect ratio CRT Toshiba Cinema Series television that I've owned since 1995, purchased brand new at the time.. I've calibrated it by utilizing the Avia disc and have been very impressed with its picture even though its not HDTV. Question is...what would cause the display of red retrace lines on the screen? They run horizontal and range from about 1/2" to 1" apart from each other and encompass the whole screen. Is this a problem that can be fixed at home or does it require a more elaborate service approach? Thanks for your advice.