Are you sure it is the board at fault, not justv the door catch? (as the door wont open). If the dishwasher believes it has just finished a cycle and the door has not yet been opened it will not let you change the program.
I had this same problem so I hooked an allen key around the back of the white door catch and pulled it into the unlocked position with a pair of pliers. Has worked fine since but every now and then the catch will pop back into the locked position when the door is opened.