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Looking for some advice on my Major Havoc, because these resets are getting rather aggravating.

It's been a while since I worked on my havoc and got it running (See this thread for previous problems and work). But in the last few months it's been resetting/crashing every now and then. It seemed like the problem was getting worse. I noticed sometimes it would refuse to boot until I tapped the control panel or something, so I figured it was a loose connection. I think I was half right.

So anyway, I resolved recently to give it some general maintenance. I pulled the thing, and did the following:

1) Cleaned and Deoxited both edge connectors (game PCB and interconnect PCB)
2) Replaced the 3055 on the AR, deoxited the 5v pot and gave it a few cycles
3) Adjusted the 5V to be at 5.04V measured at the test points near the ALPHA CPU on the PCB
4) Checked the big blue AC ripple (original big blue), measured at 0.04VAC

I figured those would be some good steps, so I fired everything back up, only for the game to crap out after 5 minutes. Uhoh.
I reached in through the coin door and touched one of the ALPHA roms, and the thing sprang back to life.
Okay, I think, shitty single wipe Atari sockets. Because If I press on any of them, I could see the AVG light go still, and the start lights stop flashing (and/or the game boots)

Cool. So next up, I bring the thing back to my bench, and I pull and replace the following:

1) The ALPHA CPU socket
2) All ALPHA ROM sockets

The ALPHA RAM sockets were already dual wipe, so I didn't bother to replace those, and I had previously replaced the GAMMA CPU socket in the prior thread.

Plugged it back into my machine last night, it ran for 20 minutes, so I stuck it back in the lineup figuring I would test it more today. Powered it up this morning, It ran for about 10 minutes and then it quit, both start buttons flashing. I powered it off and on again, same thing. I powered it off and left it for ten minutes, it came up just fine, lasted about three minutes, and then shut down again to the flashing start button state. So maybe there's a thermal component to this too?

Cool.

This time I pulled the board out again, pulled EVERY socketed chip, and deoxited the chip, hit it with a fiberglass brush, and then hit it with a burnishing tool. There are still a few single wipe sockets in this, all for the GAMMA ROMs, but for those, I just bent the legs inward a bit after I straightened them out, to hopefully make a better internal contact connection.

I then put the board back in the cabinet, and it's currently burning in downstairs (watching it remotely).
I powered it on at 10:24am. It went ahead and reset at 10:33am (screen went black, heard the boot CRASH sound, and immediately came back up), and it has been running fine since then. Where do I hunt down this stupid crash/reset??

Some other information that may or may not be helpful:
  • Test mode (including booting straight into test mode) indicates all clear, no faults
  • Some resets seem to wipe the high score table, but these seem to be the minority of events.
  • I have played the game a couple times where on certain levels, the minimap of the maze gets screwed up slightly. This doesn't appear to be correlated whatsoever with the reset events.
  • The above is the only gameplay issue I've ever noticed. Other than that, it plays fine.
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