Been working on this Apollo 13 for months now. Had all boards sent off and checked. I replaced a few suspicious connectors, installed color dmd.

Game wont start. I have all 4 LED lights on io power. But no leds on cpu. Ive checked power going in at connector 5v, 12, -12 all there. Also checked test points on cpu show 5v on the board test point. But no leds. Game wont start up. Any ideas?

Previous owner replace 2 connectors on the display power board before i got it. I believe they are correct. Can anyone upload a pic or confirm i have the wires correct.
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I replaced the power connector for cpu and j15 on power driver.

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5v was measured here. The 12v were measured from back of connector.

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I checked all fuses. But I will pull them off the board and test them. It thought the same thing about the connector. But I was showing voltage so assumed that the connector was working.

Update: Pulled every fuse and checked them. All test good. Check MPU for cracked solder joints on the connectors. They really all looked ok. But heated them up just to be safe.

Still not getting a start up. Game powers up, you can hear the speakers pop, display powers but is black. GI comes on. But no life.

This one has me stumped.

I noticed that if the coin door isnt shut I only get 2 of the 4 lights. Shut the door. I get 4 LEDs. but no action.

Would that cause it not to start? Or are segas like WMS. Where they boot then give error message. I will check for volage.

Checked batteries 1.5v each. Check leads to board 4.75v. I believe thats in range. Should be good there.

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No spread.. but i should re-seat the chips. Il try that next

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I think its just the angle 213 legs look shiny.

Reseated all chips on mpu. Still nada

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I really dont see any acid damage. It looks very clean. Not even a hint of it. I know its hard to tell but the board is shiny and clean. Feet arent fogged also board by holder is clean like bran new. Usually you can tell if someone tried to clean it up.

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Sorry i know my super close ups arent the best.

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Maybe is there anyway i can check that? Measure voltage on the board someplace and say well. If it has power here its gotta be a bad rom? Im new to fixing segas.

Excellent. I will check these and report back.

Game came with this wonderful hack. (CN2 not pictured but also looked like this) So i replaced the connectors because someone soldered wires in. I put new crimps and connectors in. So thats why i initially wanted to confirm the wires. Thanks for the heads up.
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Also these are not my zipties. So something was added or modded. Can someone send a pic of their cn2? So i can match wires.

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Unfortunatly the dmd was shot. I no longer have it. I had to buy a new display controller board. Hence why i jumped to a color dmd.

That cn2 needs another look. This pin sure has a story to tell...

Thanks for the help guys. This game feels like somethings not plugged in. Ya know. Anyone whos been around pinball knows that feeling of.. oops i missed a plug. Then find it and it works. Well a wire wrong on cn2 could be the issue.

Yep I have a manual and will start my hunt from that CN2. For sure.

OK Updates 4/27/20
Checked extra wires on my cn2. they run to a game counter down by the coin door. This game is a reimport so possibly something to do with that. Pulled fuse on the small game counter board. No changes.

Check continuity from chart above. NOTE: VCC on u212 does not go to leg28 it goes to a diode (D200)then to pin 28. in case anyone else has to test their board.

All continuity is ok. reseated all chips. No change.

I can confirm power is getting into the board however I did notice 5v is actually 4.8V. I know games can be picky about getting exactally 5v. Im a right to suspect that this could be the reason for no power up? I checked voltage coming out of power board is 4.8 and noticed my 4 main leds are lit but my 5v led is not lit. Is that pot next to the led able to be adjusted? I see its set from factory.

Just realized I was reading MV 4.8 MV milivolts. ITS NOT GETTING 5V! Darn autoranging meters tricked me.

Still hasnt booted but Im onto something now.

Thanks I may have to do that. Let me dig a little deeper into this 5v issue.

OK Checked brdg21 got 13.5V DC out of the bridge. I tried adjusting the pot it only adusts the from 4.5-5.0 MV.

Bad regulator?

No its 4.9 MV at R114

The Saga continues.

Ordered a new 5V regulator installed it. Plugged board into game. left J16 unplugged. Powered it up all lights LEDs come on (even 5v) adjust pot on 5v to exactally 5v. Everythings looking good.

Turn off the game plug in J16 and it took the 5V regulator out. Back to where I was.

Im ordering a few more 5V regulators.

Short somewhere on J16? Any ideas?

I dont see an opto transmitter board in the manual. Does anyone know for sure if there is one in Apollo 13? maybe pinwiki is talking about that system in general.

Its alive! Replaced 5v regulator again. Unhooked everything. Added things 1 by 1. And now its back to 100%. only thing i did not hook back up was this counter. Im guessing this was added when the game went to Spain for tax or income purposes. I will be permently removing it soon. What a crazy happenstance. Hopefully this thread helps someone else down the road.

Thanks everyone for your help. Im playtesting now. Not sure if the magnet on the moon is working. But im not sure how it activates in game. Il try it in settings, see what i find.

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