My D/W is not cleaning anymore: It's not spraying water on the dishes.

I've tried a rinse only cycle. Water is coming in, up to the level of the heating element, I hear a motor run for a few minutes, then water is properly pumped out. But absolutely no water is sprayed on the dishes. The bottom blade does not even move.

I've disassembled the bottom part, up to the chopper, under the pump filter. Everything was pretty clean, just greasy. I could manually turn the chopper and the motor. I cleaned and reassembled, but no change.

Is there anything I can check myself ? How could I make sure the motor is running properly ?

Thx