Mortal Kombat 2 Repair Logs
Symptom: Garbage on screen
Board failed video RAM tests. Reseated UB21, replaced bad battery holder, and tested.
Symptom: Game will not start
Board passes self tests and coins up. When P1 or P2 start button is pressed the game immediately shows "game over" on screen. Reflowed surface mount memory access controller chip at UE13 and tested board.