Thats gonna be a good one to see - I thought at first you were working on the crest road hog but I had only glanced at the topic title, now that I see the piccy and description properly I am intrigued! Never know there was a bellfruit one out there!
Im going to assume you can solder so try jump starting it. Desolder T59, and R79. That disconnects the reset line from the board. Now plug power , reels, opto and alpha display back into the board. sit the board on a chair behind the machine or something like that so that the cables reach. get a crocodile lead and put one end of it on the 0v test point. (crocodile leads readily availible from maplins etc, ebay) put program card in.
Switch on, wait 5 seconds then touch the other end of the crocodile lead to the /R test point.(R with a line above it, not R/W). That will manually fire reset - does the board start?
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