My Embryon has been plagued with what seems like random reset issues. Sometimes it will just skip to another player mid-ball during a multiplayer game. Sometimes it will just start a whole new game in the middle of a game. Other times it will just randomly slam tilt itself in the middle of a game.

I rebuilt the connectors to the power supply board. I just recently installed a Rottendog rectifier board because my old one had a hack done to it and looked a little roached out.

What other things could possibly causing these issues. I'm getting frustrated. I need to get this game reliable for league play.

Ok, dumb question.. Can I check the diodes using a DMM while they are still connected to the switches? I may have to just grind it out and test them all. This has been going on a long time and I have tried to pay attention if it is a particular switch but it seems complety random.

Thanks for all the replies so far.

Sometimes when it skips to the next player it adds up the bonus and then just starts adding points to the next player. So it's acting like a ball drain??

I tested all the diodes... They were ok. I put a new 5101 chip in and now my sounds are messed up!! There is no background sound and I just get bleeps and bloops when switches are rolled over. WTF??

Help!!

Thanks!! I was reading in the manual for trouble shooting for no sound but I didn't see that section. I think I was just freakin' out a little. This thing has been a thorn in my side for a long time. I didn't need any other problems. Haha

Ok, I see it's been almost a year and I never tracked down what caused this issue until tonight!!

Here are the crazy things that happen.

The following things happen when the right flipper is held up and the following switches are activated.

- "A" rollover switch is activated the upper saucer fires.
- "special" in left in lane causes a game tilt
- "B" rollover acts like a ball drain
- "Special" in right out lane causes another player to be added mid-game.

Ok, now how the heck do I fix this???

I don't think I checked the diodes on the coin door. I can't remember. I will have to recheck them.

Is it possible that the matrix switch next to the EOS switch is wired wrong?

I was referring to the second stacked switch on the right flipper. When the EOS opens this switch closes. At least I think it is supposed to close. That's how it's set to work on my machine.

I'm not sure if the drop targets affect anything. The problem seems to center around the right flipper. Everything works as normal unless the right flipper is up. Then the switches mentioned above act strange.

I can't believe it but the issue is finally solved! It was a stuck coin switch on coin shoot #2!! Thank you to everyone who responded to this thread helping me try and figure out what was wrong and how to fix it.

It's crazy how those coin door switches can cause so much havoc. I have an EM that was acting crazy and it was all due to a closed switch on the coindoor also.

Now when something is broke instead of saying "it's probably just a fuse" I'm going to go with "it's probably a stuck coin door switch."

Thanks again!