Quoted from ssbodyman:
Anybody else's game crash during midnight madness? I've played it twice now and 30 seconds in the game shuts down and reboots. It's killer while it lasts though.
Could be a bug in the code but, but the output from your power supply may also be slightly low. This has been a problem with Spike on and off since it's sensitive to voltage drops. Usually these resets happen when a lot is going on in a multiball (like Midnight Madness). Put a multimeter on the output leads on the power supply (not the power distribution board) and see if it reads at or slightly above 48v output (48.1, 48.2). If it's even 47.9, use the pot to turn it up a smidge to get it to 48v or 48.1v.
I've played Munsters Midnight Madness (killer mode, probably the best intro to a MM ever done) a number of times and never had it reset, so it sounds like it may be the voltage issue on yours.