Hi Everyone,

I want to thank previous posters, I've had my machine for about 2 months and have read a ton of great information from you guys. Panthera's my first pinball machine, ( played a ton 78 to 82 and haven't played since) they tend to be pretty expensive in this part of the US so I had to wait for a good deal. My machine seems to be in solid shape, new boards, back glass refinished well, but I do have a problem.

Almost every time I turn the machine on after booting up it looks fine. When I start a game I get all kinds of weird behavior, all the displays are showing numbers the credits and ball in play are wrong, some displays flicker. If I play the machine not everything scores. Through trial and error I have learned that if I run diagnostics particularly the memory check and let the machine reset itself everything works properly.

I am nervous abut trying to re-pin and/or do the ground mods people suggest, so I am hoping someone can point me to other possible issues that would casue this. If I have to do the mods and re-pinning I will, so if thats what everyone decides I should do, let me know

Thank you all in advance,
Frank

The MPU board is new. I have looked for a battery or even a place for one and i don't see either. Since high score is kept and number of credits is kept I assuned the battery was replaced by other technology.

yancy I really didn't want to hear that! Since I can play and enjoy the game as is, I will do that "someday". TY for feedback.

I enjoy fixing things but I am afraid I'll make things worse having so little experience with pbms.

The board says Swemmer Electronics. When I say new I mean replaced before I bought it not long ago. Here are pics with closeup of a nasty looking connector.

The one of the backglass shows the wrong number for credits and ball in play. When you play it offers unlimited balls till turned off.

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I appreciate you pointing towards the NVRam. Did some more research here and noticed a few people with NVram issues from Swemmer boards. I'd like to try to re-set to factory settings. Does anyone know how to do that for a systems 80 machine? And/or with Swemmer boards?

Thanks for the advice. I will definitely practice then make it happen. Could someone point me to where I can purchase the proper Molex pins? Seems like there are a couple of types. I'd like to start with the ones on J6, where can I purchase those? I've done soldering but never tried repinning on anything.

Another piece of information regarding this machine is that the seller told me it was set-up for free play. He had about 10 PBMs he was working on, so I assumed he was knowledgable. Anyways, he told me the game was set-up for free play. Having read here that free play wasn't an option on systems 80 I asked him by text and he confirmed he thought it was set-up for free play. It doesn't have free play, I need to put in a quarter and I get 9 credits. I actually prefer that to free play, feels more authentic, but maybe one of you knows if the Swemmer board can be set to free play? Perhaps that setting is messing with me?

Thanks for the free play feedback. I actually prefer that I have to put a quarter in to get credits! I brought it up thinking it might help diagnose my problem.

Well if they are power sensitive, maybe I need to replace the Orange Filtering Capacitor. Yup I still have the old one. Is this:https://www.greatplainselectronics.com/proddetail.asp?prod=CCG-15000uF-25V a suitable replacement?

Knxwledge very helpful thank you. I'll replace that and let you guys know how it goes. Question can I replace the whole harness system?

Found one on Amazon: https://www.amazon.com/s

It is 50V 47000UF for $16. Will that be fine? I am having trouble finding a 25V.

Also, the power board and sound board have both also been replaced by a previous owner.

Better link to Capacitor: https://www.amazon.com/47000UF-Aluminum-Filtering-Electrolytic-Capacitor/dp/B07MYNQ8BJ/ref=sr_1_22