ST-V board missing right channel audio

[kuze]

I had picked up a st-v board recently as a backup and upon testing found that the right channel audio doesn't work. Any general pointers on how to diagnose this? I'm not sure if a recap would be in order or if it's more likely a problem with a chip. Thanks!

 

[skate323k137]

Are you pulling stereo from the 4 pin header? JAMMA audio is just mono.

 

[kuze]

Are you pulling stereo from the 4 pin header? JAMMA audio is just mono.

I'm talking about the sounds in the test menu. I get the beep for left, then a pause when it displays 'right', then a beep when it flashes left and right together. I'm running mono over jamma but it should be combining the sound from both channels. On my fully working board I get the beep for the right channel test under the same environments (cab and supergun). On the faulty board it's noticeable that half the sound is gone in game.

 

[skate323k137]

OK, that makes a lot more sense. Unfortunately, I've got nothin' on that one unless there's a setting in test mode for mono/stereo

 

[kuze]

OK, that makes a lot more sense. Unfortunately, I've got nothin' on that one unless there's a setting in test mode for mono/stereo

Yeah there's no setting for that as far as I know. It's not listed under system assignments anyways.