Remove the control unit by very gently prying up the two outside tabs that hold it to the top crossbar with a flat bladed screwdriver and simultaneously sliding the control unit toward the front of the washer.

Only the outer two tabs have a locking notch holding the control unit to the crossbar. The middle tab is there just for support.

Open the gray housing of the control unit by gently prying the side tabs open.

Remove the circuit board the same way, by gently prying open the tabs holding it down.