I started by replacing a couple of parts recommended by others as it was making clicking noise. Ultimately, it was the Main Control Board that needed to be replaced. First the back panel on the lower right was removed using a 1/4" nut driver. A photo was taken of the board and arrangement of the wires. The wire attachments were removed. Each of the four fasteners was gently squeezed to release the board. The new board was gently pushed into place. The photo was used as a guide to reattach the wires. The back panel was reattached.