I picked up a Vs. SMB cab a couple weeks back and it came with a spare pcb. I thought it would be cool to have a fun multiplayer game to play so I had someone write Vs. Ice Climber on some eprom's for me. I was under the assumption that all I had to do was swap the eprom's because the ppu is compatible with both games. However after swapping the eprom's all I get upon powering up is a flashing blue or yellow screen. I tried re seating the chips and I also tried swapping them to another known working pcb but still had the same results. Am I missing something or doing it incorrectly? Perhaps it was just a bad write or corrupted files? Any help would be appreciated.

Hi from the new guy. I've always wanted to own an arcade cab and a couple of weeks ago I finally made that happen. I picked up a Unisystem in a trade. I was told this is a great resource to use when it comes to my cab, so here I am. Looking forward to being part of the community.