I got my LT150 yesterday. Today I made up the Cat5 shielded cable (HD15-RCA). After hooking everything up to my Pany RP91 the image flickers and at the same time I'm getting a horizontal white bar at the top of the display - just above the projected image. It happens about once every 5 or 10 seconds. Do I have a bad unit or did I mess up when making the cable?