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Rom's won't make a difference. You have pretty much ruled out an issue on the PCB, and from what we can tell it's something not quite right under the PF. I wish it was as easy as saying "look here and here" but that's the trouble with pinball sometimes... the answer can be starting you right...

Can't Steph from HobbyRoms just burn you a set locally? D

Truer words have never been spoken... I can't stress enough that having the right tools for the job can make or break a repair, and your DMM and your soldering iron are proably the two most important pieces to spend money on because you get what you pay for. Then once you have the right tools...

I dislike both for completely different reasons... Fucking F14 ≠ Fucking IJ! ;) D

Holy crap have I been busy. So busy that I've been slacking on posting here, mainly because I haven't had time to correctly document most of the repairs I've been doing out in the wild. This is a quick one that I thought would be good to share, as I wasn't able to find any posts anywhere about...

Not really. These types of issues can be difficult at best to track down. If you could figure out WHERE the voltage might be originating from, like get a voltage reading off the switch it might help you narrow down where to look / trace. D

Contact Corey @ londonpinball.ca D

Yeah, not surprising. From where I sit this seems like an issue under the PF. Something is touching something it shouldn't be. D

Yep, those are the ones I'm talking about. I had a client's F14 in my shop with a similar issue, and half of one of those op-amp's failed. If you're good at PCB repair, take them out and install sockets and swap them to see if the issue either goes away or if the music comes back and the...

Check the small 8 pin op-amps on the left side of the MPU. If they are socketed, swap them and see if anything changes. D

Interesting it's only HDMI, USB and a .156" connector. I did notice that the HDMI and USB cables were not running through any strain relief, I can see that causing an issue over time... D

Yep. I highly doubt its the rectifer pcb. If you have a DMM, toss the black on the side rail and put the ball on the switch and red lead on the ball. See if you get any voltage for giggles. This is a weird one. D

Bondo all the way. D

What I'm having trouble wrapping my head around is the fact the issue doesn't present itself when you use your finger to trigger the switches but when you use the metal ball it goes nuts... D

You will be filling lots of scratches and dents along the way Bob... :) D

not the roll overs, but the gides on each side of the upper lanes? I'm wondering if there is a stray voltage somehow getting onto the guide (if they are metal) and conducting it through the ball into the rollover and back into the MPU causing the weirdness? D