Pretty simple question on this one, hoping someone else has seen something similar.

Firepower running RottenDog 327. Works great unless you hit both flippers simultaneously, then it resets and puts the machine into attract mode. I realize the double-flipper reset is a known thing and I'm going to work through the steps to troubleshoot, but most of those steps were built for the original PDBs...or maybe there's a Rottendog one somewhere? Anyways, I noticed something when testing with the backglass off: LED1 and LED2 on the RottenDog board are both off all the time, and they only light up RED (both at same time), then quickly shut off, when the reset happens. Would those LED firing up point me in a certain direction for diagnosing the problem?

I'm really just trying to avoid having to tear off, test, and re-solder each diode if I've got something silly going like connections between boards here. Hoping these little LED lights are pointing in a direction.

Thanks for any help.

Ah bummer. I was hoping those 2 LEDs lighting up might be a sign.

Is there really no way to test diodes without removing them to test each one? I feel like I’m going to damage one just by trying to test.

Thank you, that sounds super promising. I’ll try that first.

Thanks guys!!!

Hadn’t thought about it that way, OK, makes sense. I have like 100 diodes from another project so it’s not a cost thing, more me not wanting to read stuff apart unless it’s broken

Ok, resolved. Frustrating to admit that I’m not positive on what it was, but it was either a loose wire or it was the fact that a screw was missing from the power input board (whatever feeds the RD board, I don’t know official name)…so between tweaking those 2 things, I’m back in business.

This will likely happen again, I know…esp if it was a loose connection. Just nice to have my machine back for now.

Thanks for the advice!!!

Whoa, great idea. Thanks!