Neo Geo SNK 138 in 1 - no audio

smalltownguy2

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Donor 2013
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Just received and installed my Neo Geo 138 in 1 multi cart today. I installed it in a known working 1 slot board and I get no audio.

If I lift the cartridge out and leave the JAMMA adapter board in, I still get the menu, and can launch a game, which takes me to the bios setup where I can do an audio test. The audio tests fine.

But I get no sound in games.

Just for kicks, I hooked up the stereo harness and tried that too. No go.


What am I missing?
 
Flipped Dip switch 1, and launched a game with the multi cart. I went into the cabinet settings and disabled demo sounds, then re-enabled them.

Also re-seated the cart.

Sound has returned.

And there was much rejoicing.
 
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