Just installed a set of boards on my Gorgar and found this thread while searching for a solution to the same pop bumper reset issue.

I’d be interested in beta testing potential fixes as well Bob.

In the meantime I have some ideas I plan on testing out on my machine.

I’d guess just enough to always close some of them. The switches are in a line and the scoring ones aren’t all triggered by the pop, mostly the right most series (all down) switch.

Got a quick and dirty test done at lunch today. Tin can shield worked flawlessly, no pop induced resets. Proof of concept for Bob’s coil cover design? I plan on trying a simple strip of the same material over just the switches. Should be easier to mount and won’t trap heat in the coil if that’s a problem.

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Hah! That’s the “fail fast and learn something” mentality I use on the job. Thanks for the concern but the can was only in the pin for a quick test to prove standard steel can do the job.

I’d be thrilled to test your solution as well.

After I get done with work for the day I can take some pics and measurements under the playfield if you are still looking for them.

catvilledoorman oldschoolbob

Full report as promised…

Bob was kind enough to send me two widths of ultraperm, cut to length with double sided foam tape attached.

I started with the narrowest one, holding it in place temporarily with electrical tape. Did some “glass off” testing trying to get the pop to reset the drop bank a dozen or so times. I wasn’t able to get the issue to occur so I buttoned the game up and played around 40 games with zero issues so I never even tried the wider Ultraperm piece. I suspect it would be fine but overkill. It was super simple using the adhesive foam to attach it permanently.

Looks like a simple and easy fix! Only thing I can see that may be a (very minor) issue is the shield covers the two board mounting holes in the top center. See yellow circled areas in the top pic for approximate locations. IMO those two screws could eliminated since the board is one piece and secured well enough by the remaining screws.

Thanks again for letting me be a Guinea pig (and get my game fixed sooner)

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The component side is facing out in the pics so the shield is directly stuck to the blue reed switches.

Stealing a pic from one of Bob’s posts to illustrate:

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