buttons on board don't work

oven was working fine then the micro computer board failed, just installed new one everything was fine for about 2 days then the bake convection button would not work a few days later the 4 button stopped working so i shifted the ribbon wire around then the 4 worked not the bake and now the 4 button stopped working again it seems like the computer board is not responding properly everything else was working fine prior to the replacement need to know if i should send exchange it