So I just recently moved (a whopping 5 miles) and now that I've set up my pin, some of the play field lights don't come on. It seems like they're all on one circuit, as the ascending numbers don't light up, the bumpers don't, out lanes etc... But some of the miscellaneous lights on the side do. To make sure the bulbs didn't break, I unplugged a bulb from a non working one and it lit up in a working one. Does anyone have any ideas? The game still plays and registers points and everything, I feel like there's a loose connection somewhere. Thanks in advance!

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I was checking all the connections for a while, I didn't see any dangling connections. How would I test a bad fuse on the power supply?

Sorry I have no idea what a bridge rectifier is haha! I'll do some research on it though.

Thanks, ill check that out ASAP. Just have had 12-14 hour work days bogging me down. Ill get back to you with what I find.

So I checked the rectifiers and the connections all look good, nothing was broken off or anything. I was trying to read the schematics and see which cables control certain playfield lights, but I guess due to lack of experience with schematics I can't seem to find it. I was unplugging some of the connections and saw certain bulbs go out, so I feel like it's a loose connection somewhere but I've legitimately spent an hour plus just looking and trying to find it. Does anyone else have any ideas? Appreciate all the help so far, just sad I haven't been able to have my pin functional!

https://www.ipdb.org/files/856/Williams_1980_Firepower_Schematics_paginated_from_manual_dated_March_1980.pdf

I'll check with a multimeter when I get back from work today. Is there a certain voltage I should set it to or any special instructions? Never really used a multimeter before. I checked all the connections multiple times (probably an accumalative 2 hours) and I can't find anything loose or unplugged. I was trying to look through the schematics to see what cables control the bulbs as then I could just focus on those.