Help me! I canít get my dishwasher 66512789K311 to work. I have replaced the latch and control board.I need a diagnostic test but donít know how or what to push.Sometimes this dishwasher has lights on and then sometimes itís just blank.sometimes u can start it, sometimes not at all.just a little bit ago it was flashing washing add a dish,now itís all blank again.Please someone could u help me ?