I have a Strikes and Spares that I have completely gone through. Cleaned up, polished, all pins in connectors replaced, all boards gone through and bullet proofed and bench checked, all headers replaced. New after market rectifier board (NVRAM.weebley) installed. Everything plays great, the problem is that after a couple of hours of being turned on and buttoned up whenever a game is started it will reset. Seems like there is excessive heat from the rectifier board (bridges). If the backglass is left off it does not have the problem so checking voltages is difficult since the problem only occurs after it has been buttoned up.
I have swapped in another cpu (Alteck), same issue. Swapped in another solenoid driver board, same issue, swapped in another transformer/rectifier Assy., same issue. If left on long enough all buttoned up the lights will start flickering, all the lights, controlled and GI. Once the backglass is taken off and the door opened after a couple of minutes it works fine. I removed half the GI lights from the light board. This Just allowed it to be okay longer by another hour or so before the problem occurs.
Ant thoughts, tips on what to try? I am trying to figure out a good way to measure the current draw on the various circuits. First I will disconnect the playfield lights and see what that does. If no help I will disconnect the light board lights and see what that does.
The only real pain with the the game is the lamp sockets. I have cleaned them up and checked them but many are loose and intermittent. Thinking maybe flaky sockets could be drawing more current than thay should causing the bridges to heat up more than the heat sinks can handle. I am going to rig up a small 12 vdc fan inside the head and see if that helps circulate the air enough to keep it going but that will just be an experiment, not a fix, something is certainly wrong with the game somewhere.