I have now replaced the 1uf caps as well as the other electrolytic caps on the board. It is now working with clear music and sound in game and in test mode. The only problem now is a small pop/crack/click when a ball is shot into the shooter lane(when the solenoid fires) and also when you enter and exit the menu. Not loud but doesn't sound right either as my working sound board does not do this in the same machine. I have noticed the amp chip runs slightly hotter than my working one if that means anything? I am in the process of checking all the tracks on the board which I worked on following the schematic. Any other suggestions would be appreciated. Thanks Dan