I have a MTH 20-3060-1 SP GS2 with a 3volt board. I'm having what I suspect is a MUX board problem. When running in command with the smoke unit on I will loose the cab, marker and head light. They do not go out immediately, but will after just a min or two of operation. If I turn the smoke unit off, the lights operate just fine.
My first question is, I know this was a problem on 5volt boards, but does also affect the 3volt boards?
Does anyone have the correct procedure on how to make this repair?
As mentioned in a reply above by pennsydave I checked the AGHR website for a repair fix, but I'm not seeing anything regarding that repair.
I have some old paperwork that has some explanation on making a 4step repair, but I don't know if it covers both 5v and 3v board problems. The first step listed is swapping the royal blue pins, but I'm not sure what that accomplishes as these are tied together on the 3v board.
Thanks, Scott