**Fixed! It was a bad rottendog flipper board. The board had the wrong transistors on it. Honestly, this is ridiculous. This is a known issue from SEVEN years ago (https://pinside.com/pinball/forum/topic/rottendog-flp023-data-east-flipper-board-issue). My board has a manufacture date of 2018 and I received it last month. Replaced the board with an original DE board I got on eBay and all is good**

I had two great weeks with my JP after a prior flipper issue (https://pinside.com/pinball/forum/topic/de-jurassic-park-flippers-fire-amp-blow-fuses) and am now back in the flipper dog house.

The left flipper occasionally fires well but most of the time slowly moves its way up to the stop position. When the flipper fires correctly, I see the flipper LED light up on the flipper board. When the flipper slowly moves, the LED doesn't light up.

Originally, most of the time the game was fine and the problem would fix itself. Now it happens during every game.

I have taken a look at the DE pinball repair guide, but it doesn't mention the LED at all. Based on prior pinside threads, I cleaned the flipper button leaf switch contacts with a business card, but that hasn't fixed the issue.

Any help is greatly appreciated. thanks!

Thanks guys. Good news / bad news...

Good news...cleaned the contacts as suggested and it seemed like it fixed it!

...but then a minute later, the flipper stopped altogether. This time...the cause is obvious. One of the wires to the coil broke off. But it looked fishy to me when I went under the hood, so I also have a "before" picture.

My question is...can I just solder this back on? Or does the condition of the terminal (no longer a full circle) and the condition of the wire (a little singed maybe) mean that something else is wrong?

(also Scoot - great name. maybe we're related

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Thank you Scoot fattrain BuckNaked - we’re back up and running.

Was really hoping to play but my kids jumped in once they saw it was working again.

Thanks team. Greatly appreciated.

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argh....spoke too soon.

Worked great for an hour. Strong flips and no issues. Then, midway through a game, the left flipper stops working altogether.

I turned it off and came back 30 min later and it is back to its old behavior. No LED on the flipper board and the flipper moves very slowly.

One other strange thing I have noticed is that I leave the ball in the shooter lane and hold the left flipper button, it will auto-fire. I can't say if this ever happened before, because I was never pressing the left flipper so much.

I feel like I'm close! Thanks for all the help thus far.
-S

Thank you. Called up Steve and a new cabinet switch is on the way. Hopefully that does the trick.

The flipper board is a new Rotten Dog, so hopefully cold solder joints aren't the issue.

Switch arrives in a few days and I'll report back.

Unfortunately, I'm still in the flipper doghouse. Got a new switch from Steve Young...and I'm still having the same issue.

In the video below, you can see the first few flips are strong..and then it starts to just inch its way up. This has nothing to do with the ball hitting it.

Then the video goes into the cabinet to show the flipper board and the left flipper LED. I'm basically pressing the left flipper constantly but the light is rarely going on. You can see it lights up a few times and when it does, you hear the left coil fire.

I cleaned the EOS switch earlier in the thread... but does that have anything to do with the LED not lighting? What else can cause it not to light up?

Any suggestions on what to try next?

Thanks so much.
-S

Can you elaborate a bit on shorting the flipper switch terminals at the board? I haven’t done that before.

That DE original board is tempting. May try and troubleshoot a bit more first but that is a solid option. thanks for the link.

adalogue - so that would effectively act like the flipper button was pressed, right? If the led lights, then problem between switch and board. If it doesn’t light, problem with board. Is that right?

jorro - board is new and shaker hasn’t been used, so shouldn’t have shook any solder joints loose. But I understand that new boards can be bad, too. If the LED isn’t lighting up, can that be an issue downstream of the board (like the flipper itself)?

Short version - Happy to report that this seems to be resolved. After cleaning the EOS on the left flipper with a business card, I'm back in action.

Longer version - I had cleaned the EOS with alcohol and q-tip as some had recommended. Didn't fix it. adalogue pointed me to an original data east flipper board to replace my rotten dog one. He even provided a link to a board on ebay from Nabours Novelty (https://www.pinballplace.com/). I ordered it.

I got to talking with Tim Nabours before the board shipped and he offered to talk through my issue. It caused me to revisit cleaning the EOS. After cleaning with a business card, I now have strong flips every time. Tim was just happy that my issue was resolved and kindly cancelled my order for the board. He doesn't have a huge inventory, but seems well respected for board repairs. I couldn't recommend more highly based on his way of doing business.

So...pinside was right. Clean it.

Thanks all.

Hopefully final update. It wasn’t a bad/dirty EOS. I was still having issues. Replaced it. Still having issues. Went back to @adalogue’s original suggestion (thank you!!) that the rottendog board could be bad so I replaced with the DE board. Solved!

Hopefully final update... It was a bad rottendog flipper board. The board had the wrong transistors on it. Honestly, this is ridiculous. This is a known issue from SEVEN years ago (https://pinside.com/pinball/forum/topic/rottendog-flp023-data-east-flipper-board-issue). My board has a manufacture date of 2018 and I received it last month. Replaced the board with an original DE board I got on eBay and all is good.

h/t to adalogue who called it a month ago!