Push Switch get humming sound drum doesn't turn

Dryer Repair
1

Just replaced the push switch and when tested worked fine first 2 times…now when I push it get a huming sound nothing turns. What could it be where sould I look?

2

Open the door, push and hold the door switch, ask someone else to push the start button and turn the drum manually. If it starts, replace the motor.

Here are the breakdown diagrams and Replacement parts for WHIRLPOOL REX6634PQ0 | AppliancePartsPros.com

Gene.