I replaced a coil today and ever since then I've been having this power issue. It was to the sniper tower popper so there is no diode involved.
The driver board is new and I did not replace any female plugs.
I watched the mpu just start rebooting in the middle of a game so I pressed on the Asic chip and a couple others and it helped for about 5 mins and the rebooted again. The mpu board is brand new.

I changed it because the coil in the popper was old and having a hard time getting the ball up the metal tower. It's a 23-800. I will measure the resistance.

I hear ya but just don't understand how a coil to a popper even if it were bad or soldered wrong would make the game reset intermittently. It doesn't make sense. Am I off?

Well last night I checked all the connections coming off of the transformer, took them apart and cleaned them with contact cleaner.
Tested the line voltage from the outlet and the service outlet at the bottom of the cab. They all had plenty of voltage coming in. Put everything back together and turned the machine on and played a game and within the first 2 minutes the game reset.
Next I took the driver board out and tested all the components that pin wiki suggested and they all seemed fine. I took the heat sink off of the bridge rectifier and applied some new thermal paste because it looked like the old paste was gone. Put the driver board back in reconnected all the connectors and the game hasn't reset once yet and I've played about 20 games. Not sure what fixed the issue but it seems like it's gone. Hopefully for good.

It is yes. It started resetting again. I put the back glass back on and closed the back box door and it started resetting again.

What does shotgun it mean? BR = bridge rectifier?

Yeah I saw that board you are referring to. Do I have to fix my issue first or can I just buy that board and I'll be good to go?

Also, I re flowed the solder on the LM232 5 v filter thingy because the solder looked real bad. I'm going to pop it back in and hope for the best.

I gotcha. I am going to pick one up at the A town show if they are there. If not I'll order one. But I reflowed the solder on the component in the pick below and so far no reset. The solder did look pretty bad so hopefully that fixed the issue. Time will tell.

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Still no reset.

This damn machine is cursed!!! Everytime I fix something , something new breaks. So it's been 14 hours and about 30 games since it last reset so i'm hopeful the reflow of solder for the 5v regulator did the trick. Hopeful, but far from certain.
Anyway, last night all of the sudden the right ball shooter won't fire the ball into the playfield...WTF???
So, I shut the machine down, take off the glass and lockdown bar, (for the 100th time this weekend) and wouldn't you know, the bracket broke. The metal didn't snap but the bracket is welded together where one section gets bolted down to the pf and the other holder the coil and plunger in place. Well, the weld broke apart. Now before someone says,"It is a 23 year old machine" This bracket is brand new from Marco. The game did not come with the right ball shooter so I had to order every part of the ball shooter so every piece of it is brand new. I was able to fix it last night by drilling 3 holes in the bracket to marry the 2 pieces back together. Then used small nuts and bolts to lock it down.

Can I recap what broke on me so far since the "completion" of the machine Monday night.
2 ramp optos, 1 opto on the ball trough, the plunger for the sniper tower, the right ball shooter bracket and let's not forget the game resets.
But when something isn't breaking, the game plays amazing!!!

Ok thanks. So you dont' think the game is cursed?
I'm half kidding but holy sh_tballs this sucks.

Ok. I'll give it a try. Don't know exactly where that is but I'll refer to the manual to figure it out.

Who would like one?

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I should have a few done tonight. I'll post pics and if you like, pm me your address or if your going to A town show, I'll bring them and give one there at the show to whoever needs one.

I think so. Let's see how these come out first. That plastic looks a little more involved. But do able I think.

Also, game still has not reset since reflowing the solder on the 5v regulator.

Unfortunately, your probably right.

Thanks a lot. I'm not sure the age of the caps, when I bought the machine it was missing the driver board all together so I bought a used fully working board off ebay. It was working fine then the resets started. I reflowed the 5volt regulator upon the suggestion of pinwiki and ever since the resets have stopped. Been almost 2 full days since any resets. Keeping my fingers crossed.

Bad news regarding the shooter lane plastic. The colors came out to light. But have no fear, I will keep tweaking it until I get it perfect. Just might take a little longer than expected.

I noticed last night when playing that when I get a multi ball going, most time the game loses track of the balls and the ball ends even though I still have one or two balls in play. I do have a plastic trough protecter in the ball trough so I'm wondering if it isn't causing the game to think more balls drained than really did. It does seem to slide out of place on it's own sometimes. Did anyone else have the same issue? Thanks.

I think that is exactly what is happening. The crane kind of drags the ball of the planet ring instead of lifting it properly. It's not easy getting that crane right. Thanks for the help.

Got it. I'm going to make some adjustments when I get home. That crane in general is a pain in the rear to get right. The angle it has to sit in order for the lifter bar too ride on the cam needs to be perfect.
The strange thing was in the "unload globe" test , the crane would not pick the balls of the deadworld ring but when I tried it in game, it worked. I don't get it.

Ok so when I light the lock for multi-ball, the globe starts spinning and I'll get 2 balls on the globe. As the 2 balls are orbiting and I am working on getting the third ball up the ramp, the ball ends even though I still have the third ball in play. I'm stumped. Beside this quirky issue , the game play is great.

I did purchase the deadworld mod yes so whatever software came with the mod. L-1 I believe? Not for sure though.

I'll remove it and see what happens.