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It sounds like it may be a bad topside control. You need to test power at the transformer, this is where the topside gets it's power from, the transformer plugs into the circuit board in the middle I believe. You should have 220 volts into transformer and 24 volts coming out I have seen transformers that are 12 volt out as well. If you have good voltage out of transformer then I would believe the topside has a short since you have a brand new board in there. I would replace the topside.
OK well then that makes sense that if there was a lightning strike it fried the topside and circuit board. Once you change the topside you should be good.