Hiya,
tried using my old DS capture card again yesterday (the non-soldering micro-USB version; installed it myself in early 2018 I think) and all I get is the following:
https://i.imgur.com/RWghUnq.mp4
I've tried different cables, changing the old DS Capture software to the new 3DS Capture software, opening the DS up and re-seating all the flex cables, but the result stays the same. Not really sure what the cause could be, so I figured maybe someone here knows. If I can provide any more info, I'd be happy to.
Cheers!