It's hard to say. You should probably start by checking your transformer. I don't think line voltage goes to the control board. If your transformer is OK then check out the other components (contactors or relays). Then check the windings on the fan motors and compressor motor. Give it a good visual inspection looking for anything that looks burnt and see if anything smells burnt. One question, did you turn it on or was it done before you got that far. If you didn't turn it on then maybe you'll just be looking at a transformer and you said the capacitor was out.
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