You have to open the door and remove the four screws that hold the front on. Two on the door hings and two on the other side.
Then remove front by rolling the edge out as shown in this photo.
Remove neptune front 1
Remove neptune front 2
Now you will need to get the top lifted up. Remove the four screws that hold the soap dish trim on the top.
soap dish trim
Then there is a bracket on the front corners that have to be removed.
top front brackets
Now you can lift the top and see the door lock switchs and wax motor.
You will also want to remove the three top screws near the timer and flip the top down so you can look at the control board on top the washer.
Check the R-11 resistor to see if it is burnt. This resistor burns out when the door lock wax motor fails.
Burnt R-11 Resistor on control board
If the resistor is bad you should replace the control board and the door lock wax motor.