Hi Bill, I had the same problem, and after a month the grid also did not apear anymore, It is caused by moised in the camera , (and a fuse ) The solution is a new camera, however not the Original camera (this costs 250 dollar) you can order a camera at WISH €11,- and solder it on the connector wich came from your old camera. I made pictures of the wirring so if you need futher instructions let me know
