Read symptoms of similar failures on AppliancePartsPros.com website. Identified the problem as a faulty User Control Board. Ordered a replacement Board. "Popped-out" the failed Board and "popped-in" the replacement board. Plugged in the freezer and it worked again. Very simple repair once I knew what the problem was. A caveat: be sure to unplug the freezer before attempting to remove/replace the Control Board. And, I didn't use a screwdriver to remove the Board -- I used a pair of putty knifes -- the box below requires that you select a tool from the list -- "other" doesn't work.