Your problem might be very simple. The contacts on the machine may be compressed. If the controller from the black machine works on the beige machine and the beige machine control works the black machine, switch them out. If you don't want to do that, look at the pins on the beige machine and see if one of the pins is compressed. Take a very thin screw driver and GENTLY spread the pin. Test and repeat until the machine runs. Hope this helps.