I finished up bringing back a Flintstones from a trip to the dump. Everything was tore apart, cleaned or replaced as necessary. Upon firing it up for the first time, it appears something is not quite right. I haven't done a whole lot of troubleshooting yet but there are so many talented people on Pinside, I thought I would ask for some obvious things to check first.

Everything is working except the majority of the coils don't want to fire. The Flippers are working fine and the rock crusher motor, but that's it...no other coils. I 've gone through the test and tried to get them to manually fire but they won't. Switches work fine. All that happens is that the game appears to fire up as normal once selecting start...sound, lights switches registering points, etc but the ball won't kick up and the launch button does nothing...even if I manually put a ball in the shooting lane.

I've gone through all the wiring and rechecked the connections in the backbox but nothing jumps out at me. I'm not at home to check anything right now but I thought I would get a head-start by asking if anyone has come across this before?

Yes, new fuses and just rechecked them....all fine.

I did notice that I'm getting a Row 4 short on the Yellow/White Wire displayed on the DMD Test mode.

Also see that I have 66 volts (MM might not be accurate) on "both" posts on various solenoids. Tried to active by jumping with ground wire to other post but a small arc occurs with nothing happening. Checked fuses again and they're fine. Hmmm

Also found somewhere that I should verify LED 105 fades to off when the coin door is opened. It doesn't appear that any of them go out once I open the coin door.

When I get home and have a bit more time, I guess I'll have to track down the Yellow/White wire and review the schematics?

I'll check the fuses again. I just replaced (serviced) the whole machine with new fuses, cleaned the coils and replaced the sleeves...amongst a hundred other things.

I never knew about the 1K resistor in-line...that's a good idea and I'll be sure to wire that into my jumper wire. I've been grounding it to the prop bar ground, is there a better place to ground it.

Just another point, in trying to determine the supply side with the MM, as mentioned above, I noticed both sides have equally 66 - 70 volts on both coil terminals. That had me thinking that there was a short somewhere as also indicated by the Row 4 shorted message in the Test Mode. Looking at the coil with the plastic flap and terminals down, the supply (red wire in this case) is on the right on all the coils in question. Does it matter which terminal side the supply wire is connected to on the coils with 2 terminals?

Solved the problem with the solenoids not firing. Almost embarrassed to say but I had the connector for J107 plugged into J109. It was missing the plug in the 3rd hole of the connector which would have helped to give it away. Also, my pictures were too blurry and I was unable to tell exactly where it went...guessed wrong. Good thing it didn't burn anything up.

Still had trouble with a couple of solenoids not firing at full capacity after plugging it into J107. Turned out to be one of the wires had come loose from the IDC connection. Once I pushed it down I was able to play a game...kinda.

Having some random problems. The main one is that the 3 bank targets don't light up. When you hit them they don't reset either. When the game goes through a fail check to clear itself, the eventually reset. Also the 4 bank doesn't light the "K" when you hit it. Checked the connections and they seem to be fine.

Also, the flashers don't seem to fire up in the self test. I'm going to bed and going to sleep on it.

Yup, that was all it was...thanks bigd1979. I didn't realize the flashers were on the high voltage circuit...now I do.

Onto figuring out why the machine boots into an error message and figuring out what's wrong with those drop targets. Worst case scenario, I see Marco still has the 3 target replacements.

I'll carry on with this post about another Flintstones issue I'm having. I've tracked down the rest of the random troubles I was having. There were some wonky things happening like multiple switches firing during the switch edge test. Once tracked down it was something as simple as a wire on a switch bent to the point it was shorting out with one of the other posts on the switch.

Anyway, now my last issuw...hopefully. I'm getting points when I have the ball in hand and I hit the flippers. I have no idea where to start with this one. Nothing is coming up as an error on boot any longer and everything appears to be normal other than the flipper giving points. Also noticed that on both flipper opto boards resistors are very hot to touch. Any ideas would be greatly appreciated.

Thanks for the ideas terryb. I did try the banging trick earlier with inconsistent results. However, it did give me the idea to put it in Switch Edge mode and observe.

I ended up tracing it back to the 4 bank drop target opto board. It was randomly adding points whether I hit the playfield or not. I took it apart, inspected and reflowed the solder. I then sprayed it really well with windex and blew it off with the air and heat gun. Problem solved.

That was it...had a smile on my face while I played several games. Out of the blue I got a Slam Tilt error with a stuck switch. I unplugged the slam tilt switch but the error didn't go away. Guess it's back to the drawing board.

Seems to have cured itself somewhat. I think it was the upper door switch. It doesn't seem to have any effect when pushed. I believe it shorted itself out causing the game to appear as if the door was open even though it wasn't. I'll switch it out with another game I have and see if it starts working properly.

Thanks for the tips, cody_chunn.

I should have posted in here but thought I would try the Flintstone's Owner's Club first.

Been searching the forums with no luck for a small problem I'm having and wondered if anyone else came across it? When you engage the Bronto Crane, then shoot the left orbit, the ball carries on through to the DIG lanes. I believe the same thing is happening for the left Time option on Shoot for the Machine but not the best at starting that mode. The diverter does not engage but it appears the switch is working in the orbit lane. When I test both the switch and the diverter in test mode, they work fine.
I'm going to try changing out the switch with a new one after work but it doesn't appear to be the problem.

Just digging a little further, changed out with a new switch and tested again. It's registering points as you activate the switch when Bronto Crane mode or Time is activated but still won't activate the diverter. I guess I'll test Q78 and see what I get.

Just did the "quick and dirty" transistor test by grounding the tab to the ground strap. Looks like several (about 7) of the transistors are grounding out including Q78. I'm going to do a more thorough test later today but it's starting to look like to problem is on the CPU board. Strange that the only issue is the diverter not popping up on queue and the flashers not working with so many transistors grounding.

Okay...never knew that about the grounding. I knew you could carefully ground the TP102 to the ground strap to see if a coil would fire but that's about it. Not sure why there is this so called "Quick and Dirty Transistor" test floating around the internet...that's some poor advice?

I was able to put my DMM on the transistor legs in question and getting similar voltages on all the transistors I checked. It's starting to appear to me that it might not be a transistor problem. I've got some Bridge Rectifiers on order as I should have some on hand anyway.

Rolling the ball slowly into the back of the orbit allows the ball to fall into the kicker coil and loads into the bronto as desired. Again, the left orbit switch is activating and giving points on the DMD but doesn't activate the rear ball diverter to stop it from rolling to the DIG lanes. The rear diverter also works in test mode. I even put a diode on the diverter coil thinking it was some dirty DC power or something...no change.

The switch works both ways...with the ball going fast, slow or manually triggering it. Really strange...I'm trying to figure out something from the schematics as we speak but I'm no Electrical Engineer.

I did notice that there's a bit of a buzz when the coil is triggered going over the right orbit...which indecently works as designed. What I mean by that is when I shoot the Time on the right orbit the ball diverts properly.

I'm moving this topic to "Generic Tech". Consider this thread CLOSED.

Rather than starting a new topic, I think this one is still appropriate for what I'm looking for. I've seen YouTube videos where the High Score plays the Flintstones song and a little DMD video. I've tried everything I can think of but I don't get anything after the High Score. Tried setting attract mode as well but that didn't do it either...am I missing something?

ROM is LX4.