My Sinbad shows the scores but doesn't scroll to highest score. It also doesn't launch the ball but if you manually do it the game starts up and indicates ball one. It plays normally except no chimes and the long target bank doesn't reset at all. I replaced the transistors on the driver board (it's the latest one with the extra diodes) and wonder if I should pay a technician to check it over or save the money and just order a new cpu?