Quoted from kevlarnic:Switches 51 & 52 . I checked them, & both diodes & switches are good. I replaced Q42 (top of matrix) cause it was bad & Solenoid 12 “ Line of Death Kickback” didn’t fire when it hit the switch that initiates it to fire.
If Q-42 was bad then all the switches in column 7 would not work in switch test. Switches 51,52 may just be dirty or out of adjustment or have not been hit during the last 30 games.
Quoted from kevlarnic:Solenoid 12 “ Line of Death Kickback” didn’t fire when it hit the switch that initiates it to fire.(switch #55 )
There can be a number of reasons that the kick back doesn't work in game mode. But if firing this coil blows Q-42, then there is a short from the 50 volt coil voltage to the 5 volt cpu voltage.
Quoted from kevlarnic:1 other thing that may or may not relate is lamp 04C in the solenoid/lamp matrix doesn’t work & bulb was replaced ..
There are 2 bulbs for solenoid 4c. Do both not work? If both don't work then locate the flasher resistor board with the white/yellow wire and test the large resistor, it should read 5 ohms.