Put the game in switch test, then lightly pound on the lower playfield with the bottom of your fist to simulate the trough eject coil. Observe which switch is triggering when it shouldn't and fix it.

Call Stern. Brand new game should not do this. They will help.

Its a switch issue. The game is registering a phantom switch hit. Due to that, it assumes the ball is already in play. Perhaps the lockdown bar switch? Do you have any score points from it? If you can reproduce on ball 1 when your score should be 0 and see a number of points from it, it would make it easier.

Irrelevant. No game should do this.

In switch test mode, try manually operating the ball-eject plunger .. get a finger under the bottom and push sharply upward to kick a ball in the trough. See if any switches besides trough and shooter-lane trigger.

pinwiz83,

Have you fixed your auto launch problem yet? My Star Trek Pro is less than a month old and its happening every time now. It started with it happening every once in a while but now it will go thru a whole game without me even touching the machine. I plan to call Stern on my next available business day. Please post a resolution if you have one.

Thanks,
Roger

Called Stern today and spoke with Chas. He recommended running switch diag. Seeing alert "check switch D-9" and diag results D-9, D-11, & D-15 Not in service (L, R, & UR Flipper Button). Service manual says to see next page for dedicated switch locations but they only have a diagram for the regular switch locations. Flippers work but they showed up on switch test as Flipper EOS not Flipper Button. Anyone have a clue? Will try to call Chas back tomorrow...Thanks

Its the drop target reset bracket. It screws in to the plunger and resets the target. the vibration tears the screw and screw hole to bits and then rattles the bracket loose keeping it from resetting the drop. At ball start it will see the drop is down and reset it, but it won't lock and drops signaling a hit to Vengance thus auto launching a ball. When it gets real bad it goes super nuts and will access Vengance modes in about 5 seconds. I;m waiting for my advance repair kit to arrive today. I see this as being a serious reoccuring problem. Granted this machine is on location, but to have this happen in less than two months with about 400 plays... Its going to get real old real quick

I have auto launch timer turned off and launch with flippers off in 1.5 it will sometimes shoot the ball out of the shooter lane by itself. Not all the time.
Never had this issue before. As well as not autoshooting during multiball sometimes.

It was reported to me by one of my players that the left ramp and warp ramp are flakey on my machine, I haven't seen it, but I have had a few auto (new since the drop repair) launches while everything else seems to be working. I am going to check all the opto boards and wiring to make sure.
I'll update if I get it figured out