Replaced the main board. Very easy process on the Samsung WF455ARGSGR/AA. Unplug the washer from the wall. Remove the top cover by removing the two screws on the back and sliding off the cover. The control board is sitting on the top of the washer just under the lid. The control board will have a cover over it. Remove the cover and save for reinstallation Remove the 3 screws holding the control board and place the new board in its position. Using the old board as a guide, remove 1 plug from the old board to the new board. Repeat for each plug. When all plugs have been moved, replace the lid on the control board. Replace the lid on the washer. Plug the washer into the electric outlet. Test machine.