Talon claw machine keeps resetting

in this pic red prob goes to the top arrow. black prob goes to bottom arrow. If you switch probs it is fine it will just be a negative number:
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You have a .07v drop between the power supply and first test point. Maybe not a big deal but this machine is picky so getting a really good connection at J1 is best.
 
If U9 is 4.68 then that is too high. It needs to be between 5.35v-5.4v. If that range does not work try to get 5.25v at that location then unplug the machine and plug back in. If still not slowly keep lowering the voltage and unplug and plug machine back in.
 
well crap that sucks. I am unsure what the issue would be then however I suspect the motherboard. If you want I can try your motherboard in my machine if you pay shipping here and back. I won't charge anything and can use it as a learning experience. If I identify parts that need replaced then we can talk repair price. PM me if you want and we can set that up.
 
Sorry man I am not sure at this point. Not sure how productive a call will be either because we have exhausted about everything I know on getting it going. Testing the board out in my working machine I think would be a good way to pin point the issue if you want to go that route. I plan on placing this on location Jan 2021 so as long as it is before then I can have it onsite for testing.
 
FINALLY!!! This appears to be fixed!! I have said it before and it wasn't but this time it is looking very promising. Machine has been on for 24 hours with no reboots as far as I know (I need to review some overnight video footage). In the past if I left it on "reliably" after about 4-5 hours it would start rebooting continually until I unplugged it. This time like I said it has been on for 24 hours and is still acting normal. I will be doing a full write up on my website but for this forum here are the highview steps I took:

  • 12v pin on jamma connector at very bottom of board can get burnt (I fixed it by globbing solder to extend the pin to allow connection on the connector)
  • At J1 solder the last two ground pins together for better ground (I soldered a thicker cable here going to the ground of the power supply as well)
  • Check your 5v cable going to the power supply (this was the reason for my voltage drop and the final fix for mine, connector was black)
  • Check the connector at J1 (I bypassed it for the 12v, 5v, and ground by soldering a wire straight to the pins on the board)
  • Zip tie the lockout coils (mine was already that way)
  • Once all that is done I dialed in on the voltages at U9 like so:
    • Turn machine on and at pin 10 and 20 at location U9 it should read between 5.3v and 5.4v (turn the knob up on your power supply till in range)
    • Unplug the machine and plug back in and it would not boot (Voltage at U9 randomly changed which is odd. Dial it back down between 5.3v and 5.4v)
    • Unplug the machine and plug back in and for me so far it is good to go.
Huge thanks to Scott (http://www.aslex.net/) and people guiding me on this 2 year fix

Hope this helps someone and let me know if you have any questions.
how is it behaving now? i have like 6 of these cranes that all have the same exact reset issue. replaced power supplys, turned up voltage, etc.
 
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