This ECU arrived for a regular socket job. It was barely running when we put it on the bench. If you look, you'll see that the caps had actually been replaced before, but the person that replaced them did not clean up the leakage residue, so the stuff just kept eating away at everything. “ class=

The green tint you see on the PCB near the pins of that vertical board is what you would look for to identify corrosion. This ECU required $65 in repair work.