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Anti flood, doesnt need to be reset its a float switch providing the unit is upright again it should reset it self.
It sounds like you have dislodged the ribbon cable on the control board to me, however since you have checked the board and module it might be worth checking once more all connectors are correctly in place, failing that I would be considering replacing the PCB, as anything else I would expect to see a fault code.
I will opt out as this is going to take to much time fault finding at a PCB component level.