The problem seems to be with J4 on the opto board. Luckily J4 only has one opto and its the left ramp entry opto. Its just randomly being activated in switch test without touching the game. I took my phone camera and I can see the emitter solidly lit. I also used my phone flashlight and verified the the receiver opto is working. I thought maybe it was a bad IDC connector so replaced the header pins and put a new connector on J4. I also decided to re-seat the chips on the board for fun. That seemed to lower the frequency of random switch activations but its still there. Anyone have this happen to them before? Any ideas?