Hi thanks for the question.
When its in the drain cycle can you hear a hum from the motor, Please send me the model number so I can help you better.
If the motor is going, take the bottom panel off and check this drain funnel, food can get caught in the valve and stop the draining process.
This is the white part , and it has no screw to remove.it unscrews from the motor housing.
This is the complete pump and motor assembly, on that model its the complete assembly you have to replace.