I've got allmost the same problem: I installd the chip, and it plays my original games well, but i won't play my backups, I don't get the infinity logo on boot to. But the strange thing is that the screen stays black when i remove the controller from port1
I think i've got the 'homebrew' version. But it won't even boot up the infinity manager it give me a red screen. My wires seems right: I checked it twice
so I don't know what to do anymore

I saw some pics of other people with the same chip and they used thicker wire for the 3.3v and the ground, It that absolute necessary? I will try the thicker wires tonight, but if someone got a better solution, that would be better