Two of the oven controls do on function on...

Question

Nine year old Jenn-Aire SVE47500W electric slide-in range/oven unit. . The computer module was replaced in 2005. Now two of the oven's touchpad controls, BAKE and BROIL do not function. I would like to make sure this is a touchpad membrane problem and not a computer module problem before I purchase a new membrane - which is the entire front panel of the unit.