I had a really weird thing happen with my TZ last night..... My ball lock popper solenoid has need adjustment for some time, so last night I finally did it. After putting the game back together, (drop PF, reinstall balls, glass lockbar) I played a few games and during game play, the entire game died. Now, I have color DMD installed, so it's screen was lit, but all black. I cycled the power, and still the game was in the same state. Powered down, unplugged the game, removed the backglass and went through all plugs, ribbon cables and re-seated them all. I then pressed on all socketed chips on both sound board and CPU including the ASIC.... Turned the game back on, and worked fine. I did have the vertical bars in the display, but after screwing with the ribbon cables, I fixed that too.
I then played about 10 games, and it all seems fine.
Any Ideas?
EDIT: It was definitely the TWILIGHT ZONE!