We have had our pool for 4-5 years now. After around year 2 or 3, we had an issue with the power supply unit of the robotic cleaner and ended up having to buy a new part. We just had our pool opened this morning and I put the unit in the pool to clean it. I can see the blue lights on so there is power but the cleaner is not moving at all in the pool. I took it out and cleaned the filters and put it back in the water and it still not moving. Can you advise what may be the issue to resolve as we would like to get the pool cleaned. Take care.