JAMMA cabs are pretty simple setups. Aside from controls, you have a power supply to run the board, the wiring, a display device, and the board.
You have stated that if you take the board out and try it in another JAMMA cab it works. So you can eliminate the board as an issue.
Though possible, it's unliklely that anything happened to the wiring. Possibly the edge connector though, so do check that out.
A monitor displaying red can mean many things, but as the board is working in another cabinet, but not in this one and not even playing blind, I'm leaning toward a power supply issue. Have you even metered the voltages yet?
With any situation where a game is not working, metering voltages is a basic first step. If your board is getting flakey voltages, it can cause all kinds of issues. For all you know the PS failed and is putting out 2VDC, or failed the other way and is putting out 8VDC!