Weldex monitor white stripe down one side

I have a weldex color camera system that only has a rear camera. the system is about 6 years old. The monitor works and I have a picture but there is a solid white line down the left side about 1 1/4 inch wide. I have checked all the wiring at the camera and it all looks ok. I disconnected the camera and with the monitor still on and the white line is still there, which indicates the monotor is causing the problem.

Here is a link to the photo with the screen on and no camera

Monitor photo

Anyone have any suggestions