Crooked sound Ghost Pilots

Does anyone know what causes cracked sounds in my Ghost Pilots?Some sounds work fine the others are not,especially the explosion sounds are fucked.And yes i cleaned it as good as possible and it's no bootleg i checked the pcb's and everything looks fine.
Thanks in advance.

You may want to try reflowing the solder on the sound roms.

Do you have a unibios so you can check the CRC of them?

I didn't think the UniBIOS chip checked the CRC of sound or video ROMs.

Raz is the man in the know on that for sure.

Sounds like you have a bad connection on one of the sound ROMs alright. If it does it only on that one and no other then I'd say you should clean it again and like like Hewitson said, reflow the solder on them.

Also, look for crusty stuff on the traces that may have eaten them a bit.

I cleaned the whole pcb and it has just a slight crack left,so i think it's a cleaning thing.Thanks for the help and i will try the solder thing if it stays cracked.