I have a problem with my flashers that is driving me crazy. The controlled flashers work fine, but the switched flashers are messed up. When running the coil test, flashers 1 and 5 light simultaneously for each of the switched flashers, but none others light. As mentioned, the controlled flashers test fine. I have done the following:

* Several of the resistor boards were a mess. All have been repaired and new resistors were added as necessary.
* Swapped in an MPU from a different game. Same result.
* Checked the multiplexing relay. Is is working fine. Its normal state is not to be energized.
* Tested all of the diodes on the diode board. All test fine.

There is no voltage at any of the resistor boards connected to the switched flashers until the multiplexing relay is switched. Is that correct? The resistor boards connected to the controlled flashers have voltage and the small resistors are appropriately hot (very hot).

Any help or magic would be appreciated.

Yes. Likewise, if I run the test for 2c, 3c, 4c, 6c, or 7c, they don't light but for each one tested both 1c and 5c light simultaneously. Flashers 9, 10 and the backbox flashers (controlled, not switched) work just fine during the test.

SOLVED. I had natural white LED flasher bulbs in 1c and 5c (the ones with clear lenses) and incandescent #89s in the rest of the switched flashers (the ones with colored lenses). On F14 Tomcat, the switching relay is set to the "a" coils until switched for use with any one of the switched flashers. That means there is no voltage to the 330ohm resistors on the resistor boards (they are all cool to the touch). I don't know the science of the electricity flow other than to say it all now works fine with nothing but incandescent 89 bulbs in all of the switched flashers.

Has anyone every mixed LEDs and 89s before with this result? Do LED flashers work in this game for the switched flashers?

Great info. Thanks!