While I was tearing things apart I noticed one of the heat ducts was disconnected behind the dash. My theory is, since it went out during a winter drive with all the heat on, that duct contributed to over heating the monitor. All of the ducts behind the dash were NOT secured to the dash vents. I secured all the vents with a screw through the flex duct into the dash vent. I don't know if this came from the factory like this or if the previous owner had some work done in there.
After several months of research, I found a similar looking monitor on ebay, brand new VOM-784CT ($250.), used in Monaco coaches. I took the chance and it works! So here is the scoop.
The VOM-784 is about a quarter inch smaller, no big deal. You do have to buy a separate interface cable for camera #1.
You can get it at Kingstonsales.com, Voyager part number 31100033 (about $20.).
You have to switch two wires on the wiring harness. The Blue and Green wires trigger the right turn camera, or the backup camera. I just cut and spliced them.
Because I felt the monitor overheated, I mounted a fan on the back to help with the cooling. This monitor sits right on top of the radio/GPS unit which produces heat also. I wired the fan into the same power source as the monitor.
So, I hope this works for the long term. The color monitor option will cost you at least double, but then that would be a good excuse to spring for color cameras too............