Hey all! Hope you don't mind the thread bump, but figured it might be useful to keep all the CPS3 troubleshooting of the DAVs in one place in case anyone else has some of the same problems down the road.
I shelved this extra set long long ago for the exact problem I'm having on the second pass, but I'd really like to get this finally sorted out. The board itself plays great off jamma- just the DAV that's acting a little funky. I've got a friend a state over that's hoping to bolster their fighting game scene, so I'm hoping to hook them up with this spare set and hopefully get the HDMI finally working as a nice bonus to make their future streaming efforts a little easier.
This is I think the...3rd? Maybe 4th CPS3 DAV I've done, but never quite figured out what's happening with this particular set. installed as per usual- it's one of the cps3 revisions that has the "daughter card" on the underside, so I can just follow the guide(s) verbatim afaik...but the sync just doesn't want to play nice

Here's a video to show what's happening. Any suggestions? Any chance it could be a firmware issue? I'm all out of the little buttons the QSB kits usually come with, so I need to order another couple to keep on hand (mouser/digikey link appreciated if you could!

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clip of sync issue