Hope someone can point me in the right direction from here. I have an SX 80 with no heat. The inducer and forced air blowers run continuously. There is continuity when the pressure switch is closed, but no power. Transformer reads 120v in and 24v out to the board. No power to the thermostat (or to the block on the board that leads to the thermostat). Where else can I check before dumping $ into a new board? Thanks.