You're right the door lock should not have let you open the machine. This is likely the problem. These machines have been known to have a short in the door lock that can blow the board also. If the machine does think that the door is closed (locked) it will not go into spin (for safety reasons).
So, I've downloaded the repair manual so that you can have all the information to check and test the door lock and other items. The manual has all the the different models of front load Neptunes. Just be sure you are in the section for the MAH4000.
When you go to the site to download do not use AOL. Use Internet Explorer or another browser because that site does not like AOL. Choose the "Free" option. After you download the file you will need to open it with Adobe or another application. You should already have that on your computer.
Please click here - washer
Let me know if you would like more information or clarification.