Hello! May I please get some help! This has been a grail machine for me - and the wife finally let me buy one! We found one that is in great shape, mirrored blades, LED, and just in all around great shape. We got it home, and it worked perfectly. The next morning (today), I noticed that the T-Rex wasn't eating the ball anymore. Through the manual - I found a small board that seemed like it controlled part of the T-Rex, I think its the one pictured but it may be the slightly larger one. I simply removed the connections and replaced them, and the T-Rex started working again! Hooray! However - now - sadly - I started throwing the "Missing 6 ball Error" and the switch that controlled the ball trough solenoid claimed it worked(test mode), but would NOT fire the solenoid. The solenoid still will not fire, but somehow I have started down a rabbit hole and created other issues. For starters, the ball trough switch - I removed it to examine it and it fell apart in numerous pieces. I have ordered another one - but am stuck now without it.

The bigger problem (amongst many) is that now I have this music sound (T-Rex Stomp) that comes on at the beginning and will NOT STOP. It repeats, UNTIL - I hit the start game button - once that happens, it joyfully reminds me that I am "missing 6 balls" even though they are there, and then the sound goes away. The attract music plays just fine once the cycle has been completed, but if I reboot the machine, here comes the sound again.

Please help me! I am new (very) new to the pinball world, I have had 2 projects in the past and both had to be sold because I couldn't figure them out! I bought a working machine, got home with a working machine - and somehow 12 hours later - I have a non-working machine! The wife is rather bummed to have spent north of 3k and we can't even use it!

Here's a video to my sound issue!

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Thanks for the reply and everyone else! Here's a video I took of the switch/coil tests. I know the left scoop is activated because I was manually trying to get balls out, and one rolled right in there, and I don't know how to remove it.

I will give that a try right now!

Additionally - it seems I have solved the sound issue! I actually wrote the solution myself.....I mentioned when I was manually removing the balls, one of them fell into the scoop. I took a magnet and got the ball out, and that fixed the sound. I guess since that switch was active, and the coil won't spit it out - it just decided to keep firing the sound! I've only tested that once - but it certainly fixed it the one time! I'll report back on J1 soon!

Neither yet! The wife caught me to do a "chore"......should be just a few!

No dice! I wonder if there is any chance since the ball trough switch is completely removed - with contacts dangling - since the switch broke is causing it to not complete some circuit or something?

Already fixed that one. When I was manually removing the balls. One fell in there. I left it thinking it would be fine. Turns out that was the cause of the music to continuously play

So when I could not get a ball to eject - the first thing I did was check the switch on the ball trough. The ball would push it - and not fire the coil. I thought the switch must be bad since the coil just worked. I unscrewed the switch and it literally fell apart (see photo). I disconnected the switch to remove the remaining piece and the wires now just hang (see photo 2). I have ordered a new switch.

So right now - I have the “missing 6 ball” error and (I think) all the coils related to J2 not firing.

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Meant J1 instead of J2

Just to further update here, I have fixed the "6 balls missing" - this was due to 2 balls being in the same spot, and ultimately causing every ball to be missing the switch. I did a switch test - and all of them register. I checked the active switches and now troughs 1-6 are active.

Current problems....

1. Broken switch.
2. Coils associated to J1 not firing.

I test that by putting a meter on one lug of the coil and the other on the ground strap inside the cabinet correct?

EDIT: I looked it up to confirm I was correct. I tested the coils power by placing one probe on the ground strap and the other on a lug. I got 0V at the coil. I tested this with another coil within the game (not the flipper coil) and had just over 40v at that coil. So I believe I can say that I do **not** have power at the coils.

EDIT 2: See post below!

Well - I don't know what I did - but I "think" I fixed it. I measured the voltage again at the coil, and still read 0v. I went into the back box and pulled out every fuse in the back box and one by one, tested them again. They all tested fine. After that, I opted to test the coil again - and this time....it had 40v. I thought "Well, maybe its because the coin door is closed" - I opened the coin door and measured again - still had 40v. I don't know why there's even an interlock there to be honest, nothing hits it.

But - now that I had 40v, I ran the coil test again - and this time it fired!!!!! I don't know if this is an indicator of something else being wrong and it happens to be "right" for right now, or if maybe one of the fuses needed to be reseated, or if this is a fluke, but for right now, all 6 ball trough switches are ON and active, and all the coils seem to be firing! Once I get this switch - we may be good to go! - Or at least I hope! The switch is due on Friday, but I think someone locally has one I can get sooner!

I’m going to ask a “noob” question here, but what is this component (white) and are they supposed to get pretty hot?

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Thank you so much!

Just wanted to say THANK YOU to everyone here. Got my new switch in today, installed it - and everything is back to playing properly! Still am awful, but my only pinball machine is back to 100%. Now for some mods!

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Wow - I like that translite a LOT!

So my JP is in pretty good shape (my eyes) - but I thought about adding leg protectors as an extra precaution just to make sure everything stays as good as can be. Is this a good idea or bad idea? If it's a good idea, which protectors would everyone recommend?

I bought this as my first Pinball. I had never even played the game, but am such a fan of Jurassic in generic, that it was a no-doubter. Some of the game I do find slower than I would have expected, but I still love it nonetheless, the worst thing its shown me is that now I need more pinballs to have different flavors!

Who is burning roms for the 6.0 code nowadays?