Payne furance model Year 1992 unit, I have 24 volts at the control board because I jumped out the blower motor and it comes on. Then I jumped out the t-stat at the control board w and are nothing I notice the LED light is very dim but when I jumped out the blower motor between are and g it was a lot brighter and it binks I checked to see it I have 24 volts to the gas valve I don't the wiring harness goes to a smaller circuit board that goes to the Pressure switch and then to the inducer motor I get 120 volts on the black wire to the inducer board but that's it I think tha 120 is what powers the inducer motor and I need 24 volts close a set of contact to start the inducer motor I think it might be the control board but I don't want to be a parts changer let me what you think Thanks

The small board controls the inducer. Dismount pressure switch but leave wires & hoses connected while avoiding contact between switch electrical connections & furnace. Tap the butt of a screwdriver against the small relay in the center of the board while attempting to operate furnace. If operation of inducer is observed, the relay contacts are burned.