Help with Rampage sound board

Zinfer

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Apr 19, 2008
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Has anyone ever worked with the sound on their Rampage? I'm having a heck of a time with this sound board. I've replaced every suspect glass cap on the board. Pulled all Eproms and verified them with a programmer. Reseated all socketed IC's. Traces look good on both sides. MCR audio amp is working great. PCB replaced with another so that rules that out. MCR was also replaced so that ruled that out. It's down to the 'Sounds Good' board.
Is there a habitual history of any of those IC's going out? I was surprised to find a friggen 68000 Motorola in there. Same CPU as an Amiga Computer. Kick ass CPU. Something is giving me fits on this board and I can't seem to find the problem. Im going to try replacing all the Electrolytics next. After that it has to be an IC. I'd hit it with a logic probe but there's no documentation on what should be high or low.
 
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