So I am not sure if I am 100% understanding the situation. So you originally got the F1-07 error code, then you replaced the touchpad and the error code is now gone but now you are having a separate problem of the oven not maintaining temperature correctly? And you were going to replace the circuit board originally but you didn't because the electrical connections weren't the same?
This is the clock control board for your model and serial number:
Clock Control Board - Part # PD00005783 (mfg # WP74007226)