OmniPro II "No controller Data" after lightning strike

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I have an OPII with a remote zone board in a pool house. Since a bad storm all keypads are beeping and showing "no controller data" . The 2 indoor zone expander boards status LED are blinking rapidly.

Best guess is a surge on the low voltage comm bus.

Any guidance on where to look to troubleshoot?

Thanks
Bruce Schroeder

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