Note, I'm not recommending this, but I am a self titled king of "temporary" hack jobs and future previous owner where the new owner scratches their head and say, "What the %&?! is this?!"
Option one: use a jamma extension harness and cut the ends of the the video signal wires and hook that up to the monitor. If that solves your problem, now you just need to solve a new problem, how to switch your R,G,B, Ground and sync between units.
Option 1: buy 10 light switches, or any switches really. Put the switches between your wires and monitor. All 5 video related jamma switches flipped to "on" and all 5 video wires switches from the pc switched to "off" for your jamma game and vice versa for the pc based games.
Option 2: buy another relay switcher that can carry 5 independent signals and see if that avoids the issue you are seeing. Saves you from manually switching 10 switches.
Option 3: find an A/b a/v switcher off of Amazon or something. Wire the wires to match the jacks, just make sure it can pass through 5 signals. A gamble if it would work, but probably a 12 buck piece of equipment or hit up a thrift store.
There's smarter ways to do it, but I'm not that smart to know how!
