The error code said I needed to replaced the main control board. It arrived in a couple of days as promised. All you need is a phillips screwdriver and a couple of small zip ties (not included) to re-attach the wire bundles to the new board. Only hard part is transferring the light pegs while keeping the springs and buttons in place. My husband had to hold the new board while I did this. Would have taken longer if I had been on my own. Before putting everything back in place, I tested the board by plugging in the machine. Once I saw that the error code was gone, I unplugged again and put the machine back together. It's working like a charm.