I did get the scematic back then and wanted to make a copy of it but instead I gave it to the lady that had the problem. She said that the part her guy recomended worked but I don't remember the part number although it was mentioned in the thread I think. I may also have some of the e-mails from back then on my old 486 computer.
I did send you the partical scematic, but I guess it's not enough for you to redesign a retrofit into the system.
I'll dig around some more and maybe I can get one for ya, I may still have the ladiy's e-mail address too adn try contacting her again.