TOTAN is a great game, I still want one some day. Congrats on getting one.
Anyway, as to your trouble. The only time I ever had reset problems like your describing was due to a fried bridge rectifier. Look on your board for loose heat sinks on the BR's. If one it loose, look for smoke lines above it. If those clues are present, you need to replace that BR. Its not hard to do, but anytime you have to do work on your P/D board its a little unnerving.