Went on line did my own diagnostic first replaced the mother board which probably wasnt necessary but I talked to a repair guy on the phone and based on the flashing light it was his recommendation. Dont be intimidated its not rocket science guys. Its really easy to do just mark the plugs when you pull them and plug them into the new board. Dishwasher still woudn't drain, I flushed the drain lines first. Just used the sprayer from my sink and back washed then drained it with a shop vac I finally replaced the drain pump Its all just a few plugs and screws. Im a 61 year old woman if I can do so can you Beats paying a repairman markups for parts my time is free