Started with a grinding noise in the bottom of the dishwasher, and then the thing just stopped cleaning the dishes. It wasn't pumping any water,

I removed the plasic inner parts, used the torx drivers to remove the internal platic plate that covered the sump. Found the food chopper cover and removed it. It had gotten a piece of plastiic wrapped around it. As it spun it had ground the teeth off the end of the drive on the impellor and the food chopper. I replace both as a set and it works fine.