Have J375 with FL1 code. BUT the all the pumps , ozinator, heater do not even click on . No noise once u push the buttons to turn jets on. The screen on controls displays FL1 and water temp. I believe its the mother / logic board being bad. One place said make sure im getting 220 volts from Disconnect and at hot tub and may have "lost a leg to hot tub" Said if 220 volts then logic board needs replacing. Does this sound correct? the flow switch looks like its open and dont have any bubbles/ air in lines, just looking for some guidance before I spend $275 on a board . All connections and wires look good and not burnt out or damaged