Update:
My IJ subway, left and right ramp entry, idol entry optos not registering were all fixed by replacing the opto board. Yay!
Now the only issue remaining is the Idol mutliball issues as seen in the short video below.
Locks all 3 balls but only releases 2 back into play. The Idol doesn't turn to release the 3rd ball and the elephant sound keeps sounding thinking that is releasing the last ball over and over again. Pushing the ramp exit switch manually when in this error, makes the idol turn to release the 3rd ball into play.
Idol test passes in test.