This topic in the laundry repair forum is an excellent illustration of how to troubleshoot this particular washer problem along with general troubleshooting discipline and strategy.
Study this topic carefully and pay particular attention to the pearls of wisdom from Master Appliantologists Trying to Help and Stumpowitz. Note how they make skillful use of specific product technical knowledge, asking insightful questions, directing and interpreting basic electrical measurements using clear, logical thinking to draw valid conclusions for the root cause of the problem, ultimately resulting in a successful repair.
It’s a two-page topic, so don’t miss that second page!