Hi all,
Looking to get some help locating where the sound problem is with my HS. The game plays fine, and I have background sound. I do not have any sounds that you would have during game play, nor do I have any speech. My voltages are good. If I press test switch on MPU, I get nothing, If I enter "sound" test through coin door switches, I get nothing. If I do "music" test it plays music just fine. I have replaced the following parts on MPU: U21/22(EPROMs) U9/10 (PIAs) U6,U7,U8,U1(amp),U23,C2/3/24/26, ribbion cable, and I think the cpu(U24).
Thanks for any ideas
Aaron

Thanks for the reply, I will start going over this section. I unfortunately don't have a OS, but will probably test what I can, and just shot gun the rest. Will report back with findings.

Update, still no change(no speech or game sounds). Replaced U2,U4, C9-C16.
I think I will try and find a pro to go through the board, thanks for the ideas.
Aaron