Whirlpool microwave oven combo

While removing the latch on the above oven, I noticed the oven light went out and then the pf code. I reinstalled the latch and everything on the keypad worked but neither the oven or microwave would heat up and the oven light would not come on when I opened the door. I installed a new latch and nothing changed. It was suggested that the microcomputer may have shorted out. I sent it off to be rebuilt. When I reinstalled it nothing worked and I got the e1f2 code so I got a new key pad. Installed it and we are back to ground zero. Everything works on the keypad but no oven light when I open the door, the elements will not come on and the microwave will not heat. I even tried the self clean mode and got the self clean latch will not lock code. Any ideas on this one? It all started with removing the latch.


Thanks