Starting having a problem with my mist multiball long range Optos not registering open when the beam is blocked. Game will load ball into the right ball storage area but will keep kicking the ball out and eventually gives up after about three tries. I pulled the 24 opto board and inspected for cold solder joints bad connectors or broken or missing components. Nothing stood out. I checked some resistance values and noticed that R12 on my game is just a zero ohm jumper resistor, not the 10 ohm resistor shown in the manual and schematic. Note this is factory. The board has had no previous work. See picture. Any thoughts for this anomaly?

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Guess folks just ignore these older threads even though the BSD Mist Multi-ball seems to cause plenty of issues for people as these games get older. The problem with my board has been repaired. I replaced the R12 resistor with the correct value 10 Ohm 1/4 watt resistor and while I had the board out of the game, While i could not determine if they were bad, I replaced both the electrolytic caps and the L1 inductor. I Play tested the repaired board and the Mist-multiball is working perfect again. The long range opto is registering open and closed states as it should.

That's good to know.