Well I found the problem, but I'm not happy about it. As I suspected the LED is damaged.

Here is a pic of the PCB that has the three multicolor LED's that control the cannon

Notice anything??? one of these things just aren't like the others.

I was hoping I was wrong and the "dark area" was just some surface grime, but no joy.

Now I have two options.

Put it back in and deal with a dim cannon knowing that eventually it will probably die out...Or unhook the wiring harness and just leave the cannons dark.

While the cannon lighting does add some excitement, there is plenty of other lighting on the machine, and I'm not sure if I prefer "un-uniform" illuminated cannons or "uniform" dark ones.

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