I had the same 3 lights blink. For me it was the Door Switch. If you don't feel a small catch as you push in the door switch button, play with it a little. Some times it will work after a bit until you get a new switch. That's what happened to me. Take off the top (screws in the back); take off the panel cover (two outside screws on top; take off the front (screws on bottom, upper sides and in the center) then lift up and out for the four clips to let go. Un-clip the wires and push the sides of the button housing from behind. Reverse it all back together. (Always good to take pictures of insides before taking apart to make sure clipping the right color wires back, etc.)