Soul Edge Cab

I just Bought a Converted 4 Player NBA Jam Cab

Its been converted to Soul Edge

The Display has a Geenish Yellow tint over the whole screen when powered

Though it was the monitor but i swapped the board with a jamma Sky adventure board and it diplayed perfect?

Was hopeing for some idea where to start with this as i am pretty much a newbie when it comes to troubleshooting a PCB


Thanks