Astro City 2 weird control issue

AtariShag

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I've been running Street Fighter II: Hyper Fighting in an Astro City 2 cabinet but having Street Fighter IV AE in another cabinet has me wanting to change the AC2 out with something non-SF. SF2 has been working fine in the cabinet but when I try any of the following spare boards in it:

Magical Drop 2 (NeoGeo)
Tetris (Atari version)
Toki

They mostly share the same issue - none of the buttons work, except for start. The games work properly in other cabinets. In this cab they worked when I initially tested them out there some months ago as well but I've been running SF2 for the rest of the time. On Tetris the player Start button will rotate the block at least but that's not what it's supposed to be. Off the bat I don't notice anything unusual about the wiring but I'm also not 100% familiar with how the AC2 is setup as this is the first one I've ever worked with.

Could it be a ground issue of some kind? That's all I can think of but even then I'm not sure where to look in that regard.

Thanks in advance
 
Nice to see a fellow Astrocity 2 owner. There aren't many of us out there. Awesome cab. That is very weird regarding the controls. I'm no expert but would think there is a ground issue of some type? If you like I can snap a pic of the button wiring in mine to see if its the same?

Tom
 
Multiple known good games showing the same controls issue in the same cabinet? That's easy. Get out your multimeter, find a JAMMA pinout, beep test every button, and make sure the wires have continuity and connect to the right pin.

Btw, your NeoGeo *is* a 1-slot, right? the multi-slot units aren't really JAMMA.
 
Pics of the wiring harness would be great, I haven't found many good examples online so far. It is a great cab other than this issue, I would like to get some more candy cabs in the future if I am lucky to come across them. ;)

Thanks for the advice on the multimeter, I will have try that.

Also it is a 1 slot on the MVS. I have a 1slot US and Japanese version as well as a 4-slot in another cab
 
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