Hi David. I had similar issue. Had continuity between the A points if I touched the tip of the wire, but only continuity between one set of A pads if I touched the pads. What that told me is that one, of the two wires that come through ?at point A from the windings of the power amp still had some enamel on it. Went back and really heated and re-soldered the two wires and that resolved the issue. Works like a charm now.?
