Rocky,
I've only cut a couple apart to see what's inside. If they're bad they get chucked.
It would depend on what caused the failure. They have IC's, diodes, transistors inside. And multiples of each. Depending on what caused the initial issue "generally" one of two transistors fail. That's all about the pnp, and npn electronics stuff. If it goes out there's no way at home really you can just dig in and mcguyver it at that point. Just diagnose and troubleshoot it and identify the failed module and replace it. Since time is money, the economics of trying to repair it make not a lot of sense.
A look at an MSD HEI module will give a little better idea of what it takes to build one. The guts on those are open for the eyes to see. What is kinda neat is to look at the original GM deal and realize the electronics part of all that are housed in a space roughly 3/4"X1". This was figured out way back in 1969 ish. Motorola was the big deal with ic chips back then.
All abo
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