Chosen Solution
The end-of-cycle selection (rightmost group of three buttons) allows high, low and off settings; however, no matter what else is happening, the LEDs cycle and beep quietly; sometimes that prevents a cycle starting, other times it will stop very briefly, at which time a cycle can be started. After the cycle has begun, the cycling and beeping continue. Additional note: the beeping intensifies slightly and briefly selects the “High” setting whenever any other option button is depressed. The cycling and beeping begin as soon as power is supplied and any button is pressed. I’ve reset by unplugging machine for five or more minutes; I removed the top panel and wiggled wires and checked connectors, but no change.
I ended up removing the main control board and examining it under magnification; some of the solder joints looked a little weak, so I re-soldered almost every joint, especially those which hold the relays in place. I reinstalled everything and now—it works like new!! Look up cold soldered joints to see how to do it. I’ll keep the fingers crossed. BTW, note that removing the wires requires careful attention to avoid breaking the plastic casing for the control board. I’m not sure what you would do if one of those little tabs broke off, but the wires wouldn’t stay in as reliably.
