maytag neptune washer does not start when start button pressed

when the start button is pressed the red light comes on and sounds like its starting but when i let go the button it shuts down. if i hold the button down it stays on for like 10 sec. and then it shuts off. i tried changing the start button and the wax switch but it still doing the same thing. thinking now its the motor control board but dont want to waste money on it if it is not the right part that is wrong.