I've got an interesting issue with my Royal Rumble. My lower GI string LEDs ( slings, flipper area , and coin door ) are flickering, which makes tracking the ball near the slings quite difficult. My power supply and PPB has been completely rebuilt, and the machine exhibits no other issues. I am using all single SMD comet LEDs.

Measuring the voltage on this GI, I am reading 4.9Vac.

From my understanding, this GI string (purple-black and back ) is not connected to the regular GI and relay on the power supply board. I've taken a slo motion video with my phone, which clearly shows that only the lower GI is flickering, with the rest of the GI behaving normally.

Any ideas for how to diagnose this? I can't seem to find any info on this additional GI string in the manual/schematics. Thanks!

bump. someone must have knowledge of this extra GI string added on later DE games.

My connectors have all been rebuilt. My power supply and power delivery board have all been recapped as well.

Thanks. I think the best solution for me right now is to just connect that GI string to the other GI strings. I am using an EnerGI maestro, so the GI blinking is not that jarring.

Do you think I'll have any current / burn connector issues running those additional GI LED bulbs from the other strings? My GI/Inserts are all comet single SMD.

Connected that GI string up to another. Beautiful flicker free lighting by the slings now. Huge improvement for DE machines that have this extra AC Gi string.

Royal Rumble does not use trough optos. I just isolated those 8 bulbs, but left the rest of whatever is on that string connected ( coin door and some others). Played a couple games and it’s working perfectly. Can’t believe I put up with that flickering for so long. Maybe most people don’t notice it?

My first step was finding where the purple and purple black wires coming from the backbox connected to a socket on the underside of the playfield. I believe it was in the lights in the slings. I then disconnected and terminated those feeds. Next I bridged power from a nearby gi string to power those 8 bulbs. It helps to sketch it out on paper so you can see the entire circuit as your machine might differ from mine. Basically follow the path of the wires to make draw a circuit containing all of the bulbs in the flickering gi circuit. Good luck. It makes a huge difference in playability to not have the flickering.