I have a decent grasp on electronics from the classes I took in engineering school 20 years ago. I found the service manual and schematic online. This board converts 110VAC into 12VDC and 5VDC to run the control circuits. The trouble shooting procedure in the manual shows you where to test for these voltages. 12V wasn't present, so I put my nose on the that area of the board and smelled the distinct odor of burnt electronics coming from an IC. There was also some visible charring. I looked up the datasheet for that IC and it's function is voltage conversion, so it seemed like the probable issue. I replaced it and it didn't work. Either that wasn't the only problem or I damaged something while soldering. I broke down and bought a whole replacement board off ebay and the fridge is up and running. In retrospect, I should have used an external power supply to feed the board 12VDC and see if everything else worked before declaring it solved.

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