Hi, I've been an EM guy and someone gave me my first SS, a Bally X's & O's. I was really intimated by it and have done my best to figure it out. Turns out it was in pretty good shape, and mostly needed the same cleaning I would have given an EM. I learned how to trace a couple lights that were out and resolder a little. I'm down to two things and need advice. I hope there is some help out there.
1. The machine works and there isn't any damage from the battery, but I've read there can be and I think I need to make that fix. I think the white part the size of a AA battery at the bottom of this board is it. Is that right? From what I've read, I should take that off, and replace with a separate AA battery holder with diode. Am I on the right track?
2. None of the "O" lights work. There are nine spots on the center tic tac toe board, plus the 3 more at the left, right, and top on this picture. All of the "X" work, but the "O"s don't come on. The game plays fine, just the lights. I think it's more than bulbs and soldering on the tic tac toe board since the other 3 are independent of that mechanism. I found this part of the schematic, and It looks to me that they are all tied together and maybe there is one spot that needs to be addressed for all of them to work again. Problem is, I don't know where these connect on either side. Does anyone have any ideas?
Thanks for any assistance. I'm a complete beginner on SS.