Quoted from LOTR_breath:
I have not seen this problem but I looked over the schematics. I assume you replaced the LED board #4 with the yellow wires? Are your pop bumper lights out also? I would reseat all the cables that interconnect the four led boards. Also reseat the connectors from LED board #4 to the I/O driver board. And finally reseat connectors from the IO driver board to the CPU board.
Hey thanks for the ideas. Here are the answers.
Yes. I temporarily replaced board 4 with the yellow wires. I did not observe any change so I left the original in.
No, my pop bumper lights and also rollovers do not work. In fact for the most part none of the non flashing inserts work however there are some exceptions like two snakes on the right come on sometimes. Also the two right most guitar picks are lit right at the start of the game even though they should be off. They stay on the whole game.
Other observations: sometimes the extra ball light is on but not earned. I also just realized the start button light is out.
The green light on the snake and the coffin LEDs seem to work properly, pretty sure all the gi is correct. All the flashers seem fine.
I re-seated all connectors between the board and back to the IO board. Unfortunately no luck there.