Mortal Kombat 1 only boots up when the sound board is not plugged in, shuts down or doesn't power up when I plug in sound board. Could it be a power supply
Midway Mortal Kombat II Arcade Circuit Board, PCB, Works, MKII for sale by toomucharcadestuff - Collected It!
Mortal Kombat II A-17481 GAL dump added – JAMMArcade.net
Mortal Kombat 3 - Arcade - Artwork - PCB
FS Parts: - Mortal Kombat II 2 PCB with sound board | Museum of the Game® Forums
Difference Between a Y-Unit and T-Unit Mortal Kombat PCB
Mortal Kombat PCB incl sound board - For Sale - Arcade - Aussie Arcade