No power in user interface panel Whirlpool Duet.

My wife was using the washer and noticed it stopped today with nothing on the screen. (Model GWH9250)After tapping the front panel the lights came back on. It continued to wash. after another load, the control lock came on then off. Now it has no power at all to the interface in front. I checked the outlet that was fine. I took the top off and checked all the wires from the control unit. No wires broke. Ribbon cable looked fine. Someone mentioned when u unplug the washer and plug it back in, you will hear a click in back where the power cord comes in the back of the washer. I did not hear any click at all. Not sure if its the control board, user interface, or relay in the back of the washer where the power cord comes into. Thanks