The touch pad on our whirlpool range stopped working. replaced the electronic control. pad still doesn't work.?

the stove is only 2 yrs old. the touch pad that operates the oven, timer,clock suddenly stopped working. the tech said it was the electronic control unit, which we ordered. but just replaced and it still doesn't work. there is power there but nothing happens when you press the key pad.|||The first question I have is has a liquid been spilled on the electronics in the range? Electronic range controls can easily be damaged by spills, requiring replacement. Did you replace the touch pad or the curcuit board, I usually replace both.