Huh, 2013 you say. Boards that are 10 years old can certainly have light surface corrosion on the socket pins, especially if they were manufactured in China.
Not saying it's a certainty but your symptoms point to an intermittent issue with either power (caused by connector corrosion or failed components) or ROM/CPU sockets caused by corrosion.
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I have a test for you. Boot the game and put it into game mode so there is a ball in the shooter lane and confirm it's running 100%.
step 1:
Gently wiggle evenry single plug in the head until it crashes. No crash? Go to next step.
step 2:
Now, gently tap the plastic end of a screwdriver on ALL socket chips on the MPU board until it crashes. No crash? Go to next step.
step 3:
If you still can't get it to crash, take your open hand and smack the backbox directly in the middle (on the back) to see if it crashes.
step 4: leave the game in game mode with ball in shooter lane and go make some tea or coffee... set a timer on your smartphone and come back every so often to see if it crashes. At what time did it crash?
Report where/if it fails here.
What we are doing is trying to see if this is an intermittent power issue or an intermittent corrosion issue. Both are VERY common with vintage Data East pins.