I have a 4.3" tft screen hooked up to a gamecube that is doing something odd. When there is horizontal movement in a game (for example running to the right in smash bros, or rotating the camera in super Mario sunshine) there are vertical lines on the screen. It is more noticeable in background areas, such as the sky, but is across the whole screen. There is perhaps one line per millimeter. When standing still or moving away from or towards the camera, you can't see it. Any horizontal movement however triggers this. The screen is receiving composite input. Has anyone else experienced this? I've read that there is a similar effect in wind waker, but I haven't played it myself so I can't confirm it's the same. It's a gamecube portable with a disc drive, not a wasp. There is a xenogc modchip installed, but I doubt that's the issue.