Is there any life left ??
Does the circuit board work at all? If it does, then you can maybe put it thru its diagnostic check by following the directions on the tech paperwork inside the control area. It may help pinpoint what exactly doesnt work. Maybe just a blown relay or if you are adept at it, remove the circuit board and look for a burned out component or see if any wire traces have been burned away. If that happened, you might be able to solder in a new wire or wires to bring it back to life.
You may want to contact midwest timer service to see if they can rebuild the board. And last but no least, maybe John (combo 52) has a spare board hanging around.
You could actually convert the unit to an electromechanical unit if you find a donor machine or convince me to part my Monterey 21 out to you, which I may be willing to do if you feel you want to go that route.
Even when those boards were available, you were talking more than the cost of the whole machine so you can see why there are none left!