dear fellow pinsiders-

I have an potential electrical issue with my Cyclone that is beyond my, admittedly amateur, skills at machine repair. Here's the situation - a year ago, I replaced all lamps (GIs, flashers, inserts) with cointaker LEDs, and up until 2 days ago, all lights worked flawlessly. Now, everytime I hit a flipper, either left or right, half of the flashers on the playfield and half in the backbox momentarily light up.

I've read other related posts in the forums and noticed advice about diodes, auxiliary power boards, flasher PCBs, warming resistors and even straight-up incompatibility of flasher LEDs with system 11 machines. My situation is different in that the flashers have been working fine until recently, but now the flippers seem to be sending electricity to half of the flashers - this would lead my highly scientific mind to think that something has died or is in the process (fuse, resistor, etc?)

Anyone have an idea or 2 of where I should start looking?

p.s. all single coil/flasher tests check out in test mode

Thank you wayout440 - I'll continue to gather evidence here to try and provide more focus - although this could be one of those needle in a haystack problems. I have run through the coil tests and all of the kickers/coils and flashers test out correctly - no oddities to report. Also, the flashers still work just fine and light up as programmed during gameplay and attract.

During the switch level test, I'm getting 2 hits back - a 10-point leaf switch (37) and Outhole (10). i'm gonna check these out for a short.

I have re-seated all connectors on the CPU, aux power, flasher drive boards as well. I did not remove the warming resistors on the flasher drive PCB mainly because the LED flashers worked just fine on day 1 of install. I do have a suspicion that these resistors are failing and allowing enough juice to get through when hitting the flippers (again amatuer theory there). I guess it wouldn't hurt anything to cut them out as a start(?)

could someone help point out which resistors on this board that I should remove to (hopefully) solve my question?

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