I have left the system installed in case someone local wants to see it work. I will include the partially functional (it will not direct a turn to starboard) Type 100 ECU for shipping costs. If you want it.
What is the failure you are seeing? I have a type 300 that failed a couple of years ago. It was a known problem by Raytheon back in the day, which I found out by some googling. I also found the repair instructions which was to solder a diode between two points on the controller board. It's been an working ever since. Attachment 260615
Thank you gentlemen for your interest. Raymarine tech support says you can use Type 100/300, S1G or an X10 course computer with the ST6002. Also I considered trying to repair the computer but in the end after trying two used computers which did not work I went with a new Garmin system.