Assuming your system works properly with a US system card and games then I'd bet on the converter being the problem. Like SignOfZeta mentioned, some converters just don't work too well with the arcade cards. For example, on my old workhorse (TG16w/CD) my green "diving board" converter works with some AC games but not others (such as grafx problems in Sapphire etc.). I have 2 purple converters that look exactly the same and one of them has problems but the other works great and I use it all the time. My Kisado converter seems to work fine as well.
Best advice would be to find someone else who could test the ACPro in their system just so you could be sure. Best of luck!
Here's a trick I've learned seems to work well with these types of problems. For me, it has elimated the "graphics glitches" and other problems (including "hanging" at the System card screen) associated with converters and System/Arcade cards on US systems. YMMV, but this trick has worked *flawlessly* for me for years on converters that normally have issues with these types of cards.
Cut a rectangular piece of cardboard the exact size and shape of a HuCard from a large matchbox or another source of VERY THIN cardboard. When you insert your Arcade Card (or other non-working HuCard) into the converter, insert the piece of cardboard beneath the HuCard so that it is flush with the HuCard on all sides. If your piece of cardboard is too thick, you won't be able to insert it with the HuCard.
What I've found is that for whatever reason, some of the larger Japanese HuCards (Arcade Card, System Card 3.0, SF II)-- generally the ones with the raised label-- don't make contact with some converters the way they should. Adding the cardboard adds a slight thickness to the card and allows it to make proper contact.
Don't ask me why this is, but I've been doing this for ages and never had a single Japanese HuCard not work on my TG-16 using this trick. Good luck!
Topic: Will this work? Tg16 w CDrom addon, converter and Arcade Card Pro! (Read 521 times)