Seeking Help Changing Games - Vs. Unisystem

[TheToxicCollector]

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.

[Hooligan93]

Double check your SMB PPU make sure it is 004. Ice climber and Clu Clu only works on 004. I believe SMB and excitebike work on a few different PPU. I just started playing around with VS so i am no expert. I am not sure about this but i might have read that the games bins have to be doubled on each rom?

[John's Arcade]

This happens a lot. Try different CPUs or reseating the CPU chip

[KingofInfiniteSpace]

Is there only one kind of CPU? Does it work will all the games, or is it like the PPU, of which there are multiple versions?