Hi I have a Williams Sorcerer that will not start up. I had a very good friend come over to look at it and he was 90% sure it was an MPU problem, but not sure where to start on it as he doesn't have a System 9 Computer tester. We turn on the game and 0 shows up on the MPU, but does not go into attract mode. Balls are in trough when testing. Display shows 00 in player 1 and some weird numbers in player 3 when booting sometimes. 2 different buttons on the MPU 1 for sound 1 for test, sound one works great but when pressing the test one nothing happens. Power module giving off correct voltages. I'm looking to send the MPU off for repair, anyone interested at taking a crack at fixing it? Clearly I'll be paying if its a professional. PM me if interested and thank you!