I've got a great Starship Troopers but I have some issues with it. Some are not properly registering switches and some other minor issues. But this one I don't understand:
The opto in the right lane isn't working. I took a look under the playfield and I noticed that the "emitter board's" LED is lit and it is pointed straight at the "receiver board".
I also noticed that the red LED on the "receiver board" is lit. However on the left side it isn't and the opto is working just as it should do.

I believe my "receiver board" is broken.
What do you think, is there some chip or something like that on this board I'll have to replace, or is it an entirely different cause?
Is there any fix to it or would you advise me to get a new one?
I would like to know more!

Thanks in advance. I am grateful for any suggestion you make.

It is a special opto, which I believe they just used for some of their games. If there is no other fix to it, I'll have to replace it. But it seems to work though, but not correctly. Because of the lit LED, you know?
And it isn't cheap replacing it as you can see:
http://www.marcospecialties.com/pinball-parts/520-5083-01

Maybe somebody understands what exactly is broken on my board, so I maybe just have to replace a tiny diode or something else instead of a whole board.

But thanks for your advice though

I still would like to know more!

I feel like optos are always a problem on these games.

I had an opto issue on my AFM once, which caused the whole game to act crazy!
Luckily that is over!

Now comes my new project, Starship Troopers!

CPU Board currently is in repair, so I can't test the game anymore. It should be back in the game around next week.
Then I am going to take a look at that problem again.
Maybe it was an issue with that board, who knows?

Thanks for your participation