So I've been reassembling my Party Monsters and installing a full set of LED's while I'm at it.

I turned on the machine and ran the lamp checks, everything is good there. I moved to the coils/flasher check and all the coils fire but I think half of the flasher columns aren't working.

This is my first system 11(B) game, and my understanding is that the coils/flashers are multiplexed together. So if the coils are working, and some of the flashers are, where do I start checking the flashers that aren't firing?

Ones that are not working:

Elvira Flasher (Sol 9)
Rightside/Graveyard (Sol 13)
B Board/ Dead Head (Sol14)
Boogie Monsters (Sol16)
R Return/Hot Dog/& More (Sol6C)

The rest all work.

Just the topside was disassembled. Mainly to fix several stripped/loose posts, the middle ball gate that was keeping the ball from coming out of the Barbecue pit and to install the LED's and new rubbers. I also reconnected a few GI wires that had came loose.

I've looked over the sockets of the flash banks that aren't working, I didn't see any broken wires. None of the connectors were removed by me prior to troubleshooting the flash lamp problem. I can't say for certain if these flashers have ever worked since I've owned this machine. I've only had it just over a couple of months, and I've had it apart fixing all these little issues that were eating at my pinball OCD for about a month now.

Currently, the machine isn't all the way back together yet. Just the (new) ramps are pretty much all that is left to get put back on.

I actually tried that last night, I was planning on getting my multi tester out tonight and see if I can detect anything. All System 11B coils/flashers should have power to them at all times correct?

Tried that, nothing.

But while doing that, by accident, I hit one of the flipper buttons. I noticed that several flashlamps all flashed at the same time as I hit the flipper buttons. Not all the lamps flashed together, some that have not worked yet did flash, and some that work normally didn't flash. Some flashers have yet to light at all. (Elvira backglass, right outlane)

Deeper down the rabbit hole...

Same results.

Using my multimeter, I found that most of the flashers are powered, regardless if they flash or not. Only the Boogiemen flashers don't seem to have any power to them. I'll run those wires down tomorrow.