Although it could be a wiring issue, or control board problem, the most likely problem is your door lock. The LD code occurs when the machine sort of times out, which yours will do since it is waiting for the control panel to be told the door is locked.

If you take off the bottom panel you should find a tech sheet in there with troubleshooting instructions

Run through the tests and see if you can confirm or narrow the problem.

Good luck, and let us know what you find out.