I have repaired a thousand of the clocks with no comebacks!! The information took me a few hours of electronics books to figure out, but here goes. The faiure in the clock circuitry is the two capacitors. They are small round things that look like miniature cans with two pins each and are standing side by side on the board. The trick to getting the clock out is that it is soldered to the chasis after the screws come out. To get it out you will have to locate the little gold colored piece that it is soldered to and de-solder it.
Good luck!!

PS One trade secret down the hatch.

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Benzmac:
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