Highgate, VT
Quoted from UltraPeepi:Problem found.
Diagnosis was made harder because I forgot that the LED kit I installed came with light strips that connected to 12V. THAT was the problem. The light strips were drawing so much current, the 12V (unregulated), dropped to 8V and the sound board malfunctioned.
I thought this voltage drop was a power supply issue (because that 12V is only supposed to go to the sound board). So I bought a power supply cap kit for about $25.
I disconnected the LED strips and all is good.
I have had issues with 12v power strips doing the same thing so I have since switched to 6v from comet and it seems to have solved my problems. If you have swapped out the gi with leds, the pin would easily handle the load of a few strips connected to the gi. And you don’t have to find a 12v source in the backbox which makes wiring much easier.
Curious, did you update the power cable as requested by Sega’s service bulletin?
http://arcarc.xmission.com/Pinball/Stern%20Service%20Bulletins/sb/sb106.pdf
https://www.pinballlife.com/sega-harness-update-kit-for-192x64-displays.html
