Quoted from Sirgubster9:So I always thought these would turn on when something cool happened, but I just wasn't cool yet. I discovered they are basically supposed to be on right off the bat. mine are never on. I tried just replacing the bulb but that didn't solve my problem (very possible I used the wrong bulb, but it fit and i figure both being out.. possible but rare). I went through the test and yep they don't ever go on. I have figured out that they are the 1R, they are Q46, and they are on the CPU. i know I was able to test when a set of my switches went out by connecting two spots using a wire. you guys helped me figure that out, thank you. Can one of you guys just give me a quick run down on what the test procedure should be to figure out what the culprit is. I for the life of me cant remember and its probably somewhere in this thread, but I've already read through it once and I'm trying to avoid reading through it again.
I may be dreaming this up, but If I remember correctly when I first got this game as a project I had a similar issue, the 12V flashers are connected in series. The board supplies 32v and it’s divided between the bulbs. If one of the bulbs in the circuit is blown or missing there isn’t enough resistance and the paired bulb with blow as well. The flashers on the playfield are linked with on in the back box. Check the schematic to see which are linked or go through test to see what isn’t lighting up in the back box and try replacing both.
If I remember right, the area where those flashers are is tight. Make sure those sockets aren’t shorted to something.
Also I don’t think the game likes a mixture of incandescent and led bulbs so make sure you’re using the same type bulb in the circuit.
I’d also recheck the transistor and predriver with a multimeter again to make sure they’re within spec.