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Hello All,

I feel like I'm going a little crazy here so asking for a sanity check. I've been trying to fix a set of seven mostly-broken arcade machines that came to me unexpectedly. I've always enjoyed tinkering with gaming systems, mostly jailbreaking more modern ones, but worked in a CRT repair shop briefly as a high school gig and like electronics and challenges so it seemed meant-to-be. They came with a house I bought. But I'm a year in with very little success to show for a lot of toiling! This Golden Tee machine for example, I had a local repair guy run triage quickly on all my machines. We sent my GTF board off to be repaired and when it came back unrepairable he threw in the towel. I ordered a set of boards on this site and the second one worked. Among the 3x video cards I had, one of those worked too. And I bought GT Fore Complete on a new SD card reader to replace the old CD drive. But voltages were reading a little wonky and the machine restarted a LOT so I replaced the relatively new (~2019?) SuzoHapp PSU with a new one from Gatorcade. With the new PSU the cabinet booted and I navigated the menus and started a round and CELEBRATED! A little too soon. Because the machine persistently resets unexpectedly. Last night it reset 3x on my first swing of the first hole even when I rolled the trackball gently (so not a loose wire + machine vibration issue). I'm also stranding on a rubber mat so it's not a ball static issue. The ball looks great and I couldn't find any wiring issues with it. I noticed that when the game booted my PSU leads would measure +5, -5, +12, -12 (All quite close to those numbers ... it seemed to like +5.15V as primary voltage). But sometimes between plays the boot screen would give me the low voltage error and I'd measure and the taps would be +5, -7, +9, -17. Really weird, right? At first I thought I was making some kind of mistake with the multimeter but over the course of a couple hours of messing with the machine last night I observed the machine go from working with good voltages (but restarting on trackball action) to boot screen low voltage error with those weird secondary voltages, back to good voltages and booting, back to bad voltages and voltage error screen ... back and forth several timies. And when they're bad they'd always measure as those same oddball voltages.

This wonky voltage combined with the random restarts sounds 100% like I got a bad PSU, right? I just seems so unlikely that a 2019 SuzoHapp PSU and then a 2024 SuzoHapp PSU would be what prevents a 25yo cabinet from working! Would seem like terrible luck but hoping this is the issue since it's so easy to fix (I've contacted Gatorcade and waiting to hear back). Please let me know if I'm overlooking something else. Thanks!
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