Need Help

I had a service tech come to my home to look at my washer, he told me that I would need to buy new control board. No problem I went to parts store and order new control board, simple disconnect and reconnect. Still doing the same thing, it will run through the first couple cycles just fine but, when it gets to the rinse/2nd spin/final spin it starts cutting in and out. It will start spinning for about 20 seconds cutting in and out like it has a short? Any help would be great.