SOLVED. But you guys are going to be very, very angry at me.
So: I was right initially, the first pre-amp had been zapped during the storm.
What went wrong afterwards? A very simple stupid mistake: I had the power inserter facing the wrong direction in the connection. A real Homer moment. Where it says right on the inserter, "To Antenna", it means that direction. Boy, oh boy. The good news is dummy does not have to go up on the roof again for a while.
Another thing: Surge protection is your friend. Frankly, I've long thought of getting one for the house. Some of those in-wall units don't make it.
Thanks all and please consider making this a stickey 'cuz there's gold herein.
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