Super HD System 3 Pro not booting Hucards

[/turboG16]

So I've got a PC Engine that has been recapped recently and has the jailbar fix (but no RGB mod,) and I've attached a new Super HD System 3 Pro from Terraonion, and it works great, until I try to put in an actual Hucard and turn the console on. Seems to be powering on, but it's giving me a black screen. It says in the manual that you can bypass the SHDS3 and play a Hucard, so what am I doing wrong? When I remove the SHDS3 Hucards work again.

submitted by /u/No-Significance-4320
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