Thanks for the information. Our HVAC guy was able to fix the wiring enough that the AC works until a replacement board comes in. Thankfully its all still under warranty as we just replaced the unit a month ago. Phew.
edit to add: but good to know about that buzz you mentioned, because it was loud when the surge and following outage happened. Our AC unit sits against the exterior wall to our bedroom, so I heard it. It was so loud. I seriously thought it was in the walls, but must have been the unit and the control board going up.
Neighbor next door had issues this morning too, some of his downstairs outlets were fried completely, not even a breaker tripped, just fried them. Whatever happened in our area last night did a doozy to our electric. Saw a BGE truck outside another neighbors house earlier.