I have a very interesting issue with my new Splitfire. I've talked with Eric about it who has been great, really went out of his way for some troubleshooting stuff, but ultimately we've ended up here.
I have a UMK3 board that I CANNOT get a video signal from. The AUDIO output from the splitfire works very well. I took my splitfire and OSSC over to my friend's house, where we tested on both his MK2 and UMK3 boards. They worked with no issue. At first I thought the issue might have been with the OSSC, because of not getting any video sync from the splitfire. However, the audio working made me think there could be issues elsewhere, but lo and behold there's something that doesn't like my UMK3 board, or my UMK3 board doesn't like. My UMK3 board and cabinet have zero issues at all with the existing JAMMA setup - all buttons/switches work correctly, monitor is fine, audio is fine, etc. But for some reason I just cannot get a video signal from the splitfire to my OSSC.