8.2L Detroit No Start

I'm working on an old tree service truck for an estate, 1987 Chevy 7000 with an 8.2. Was running when parked several years ago. Starts and runs easily with ether or gas rag, but won't run on its own. It has the newer style electronic governor with no visible shut off solenoid. I think it's pumping fuel because I noticed a small leak in the return line, which I fixed. I took the lid off the governor and inspected the motherboard, but I don't see any signs of shorts or melted spots. I removed...

8.2L Detroit No Start

8.2L Detroit No Start