Pool and Spa
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It sounds to me like you may have just blown a fuse in transport. Open the control box under spa to expose the circuit board, on that board you will see one if not more Fuses mainly look for a 20 or 30 AMP fuse in the lower left corner of circuit board area. This is the main power fuse for board, then tend to blow quite often. From there look for the transformer on the board, this is a square unit with a square plug coming out of it, that square white plug goes into the center of the circuit board it should be self explanatory once you see it, if this came loose it will not send power up to topside control. Check and reset ALL breakers in the system, and check voltage out to circuit board from House.