Thanks for the posts! I'm the new HS owner btw. ;o]

The machine will reset randomly, and it doesn't matter whether the game is being played or not. It's been moved to several different outlets on different circuits with no difference. The current circuit it is on is a newer circuit that is only being used by a TV, two lamps, and some other pinball machines. Nothing is currently on, just the one pinball machine so nothing is drawing power except this machine on that circuit. I have to eliminate this as an option.

So according to your description, it's not a slam switch type of reset. It just reboots, no message, just right back to the start. I do get a "ding" sound when it reboots, but I also get this when just turning the machine on. Slam tilt or just normal boot sound? maybe I'll make a video of this..

A couple of things you had mentioned I will check, such as the 5v power - if there is good documentation of how to check this online, can you point me to it? I'm not very electrically savvy in the pinball world, so I have some learning to do.

Coil Diode's - where are these? Keep in mind, it's not going to be anything mechanical (since it happens when the machine is just on and sitting there).

Al- btw, I fixes all of the switches, everything works - the left ball launch is still randomly triggering; it always triggers when you first turn on the machine about 6-8 times then stops, and randomly during play it will trigger about 6-8 times. weird, not sure what is causing this.

The dim lights (more they do not work) are definitely caused by the ground plate and/or the wire that grounds it. I was able to bridge it to another plate and make them all function correctly, though I removed this and will properly diagnose the problem.

thanks for the help everyone!

I haven't gotten a chance to work on it yet, but I'll answer shpwizards questions:

Does the dome light work? yes it fully works

Is it power cycling in attract mode when the dome lightsor is supposed to light? Try cycling the dome light in the test mode. Power cycling as in does it reset - no, the dome light does not trigger it to reset. All lights seem to function normally and do not trigger anything.

Does it work fine for maybe 10-15 minutes, then reboot? Does it reboot on a regular time interval?
I was timing this to see how long it would take. At minimum it would be about 6-7 minutes, sometimes longer, up to 15 minutes - I wanted to determine if it was close to an exact time, say, if attract mode was causing it, but it was fairly random.

I got a chance to play around a bit with this yesterday. I've checked all of the connections behind the headboard, and I am pretty satisfied that it is not back there.

When the game is first turned on, the right launcher (that kicks the ball out to the flipper), will trigger about 8-10 times. When the game does the reset, it will also cause that launcher to kick over and over about 8-10 times. It will do this randomly as well, so it's not just specific to the reset.

The reset is also seeming to be the same as if the game were slam tilted. Makes a ding, and goes back into attract mode.

Does this mean anything to anyone? ;o]