I've recently acquired a Chicago Coin 1947 Kilroy machine. It's a flipperless game, not a bingo. Its basic pop-bumper and kick-out hole scoring. I can't get any of the scoring lights on the backglass to light. The overall backglass bulb lights up, but that's on a separate 120VAC circuit. Most of the pop-bumpers react in that they pull in a relay and the kick-out holes react as well, but the two middle pop-bumpers and roll-overs don't do anything. Nothing registers any scoring lights. Does anyone have any ideas? Tried searching for a "tilt" relay that may be tripped, but to no avail. I've manually manipulated all the relays, I've cleaned all the contacts and nothing is visibly not making contact. Does anyone have any schematics they would be willing to share or even sell. Even if its a different Chicago Coin flipperless from that era. I've searched high and low and haven't been able to find anything schematic related. Even Steve Young doesn't have any schematics on these.
TIA
Dave

Thanks, yeah its definitely not a fuse, mine has 3 and all are good. I did find a broken solder point on one of the relay switch blades last night, which solved my middle pop bumper and roll over problem, so now those are reacting. I still however am not seeing the scores register on the backglass. The step-up cams are moving, the points are making contact, just no lights to show a score. I'll occasionally get an 80,000 or 100,000 display now, but there is a whole left side of number showing 1000, 2000, 3000... that I assume should light when the pop-bumpers are hit, but they are not.

Yes I have, I've gone through the whole machine (not that much to go through) and cleaned everything. Nevertheless, It certainly wont hurt to do it again, anything is worth a try. Such a simple game and its eating my lunch! There are just so many brittle wires, I have to believe its something just not making contact properly and a Jones plug and/or bad solder joint on a plug would definitely be a culprit. I fear its the latter, just wish I had a road map.

Thanks for the suggestions guys, yes, I've checked the fuses, checked the fuses, and just to be thorough, checked the continuity across the fuses (lol). I've also cleaned the stepper fingers and checked the connections to the steppers. There's only two stepper units. I'm gonna go through everything again and again.

Just a follow-up, turns out I had 20+ bad bulbs in a backglass that only has a total of about 24 bulbs, go figure.