When the bake cycle is selected, there is 120 VAC sent to the module mounted on the back of the range. That voltage is changed to DC voltage and used to spark the igniter. So, we need to determine if the module is getting the 120 VAC. The bake relay is labeled K3 on the board and is what needs to close to send the 120 VAC to that module. Can you locate that relay and measure if there is voltage making it out of that relay to the module? Test between the wire to the module to ground for 120 VAC, let me know what you find. The oven does need to be set to a bake cycle to test.