I am restoring a Bally Cybernaut and I thought I was done till I was watching a few YouTube videos and realized some of my sounds aren't playing. This machine has been in my grandfathers private collection for the last 25 years and is in excellent shape, however as long as I can remember the sounds have been the same. It has the cybernaut "heartbeat" sound and others but not all of the sounds in the videos! Any suggestions the pin is the 808 of the 900 ever made. So I assume it would have had all of the chips and drivers they put in the game. Thanks for any hints or tips