kitchenaid superba combo oven/micro

M:confused: y combo "ultimate cook" micro on top, oven on bottom, didn’t work properly after using the ultimate cook feature and then onto micro cooking. Micro doesn’t warm like it should anyway. A repair man came out and stated it was the control panel. Had one installed and now the ultimate cook doesn’t work at all and the microwave is just so-so like it was before? Any ideas?