My Star Trek next generation pinball has no sound with two different sound boards. Both boot to sound board interface error. I bought and installed new sound board and cpu roms in known working board. Both boards do the same thing. The ribbon cables I swapped out with a know working game and the sound works fine in Indy with that cable. I checked power and grounds to the sound card and they are fine. I do not know what else to check or try? If I put a pinsound board into it the game has sound and plays fine. Any suggestions would be great. I am two steps away from just buying another pinsound board, but wanted to see if anyone had any suggestions first???