I finally finished restoring my house so I'm finally looking at some backlogged game repairs I've had sitting for a year.

STTNG was working great. One day around a year ago, the DMD was only showing half of the screen (left half if I remember right) the next day I turned it on and the whole machine was dead.

Fast forward to yesterday I plugged it in, the DMD will not come up at all, the only sound I get is the initial power beep, and I get attract more lights.
I started by testing the voltage on the power driver board, 50v is coming in at 78v, 20v is at 1v, 5v is at 4.9v. If I credit it up and start a game, it appears to start a game based off the lights, occasionally it will kick a ball out into the shooter lane, then all 3 flippers fire and get locked on until I turn it off.

I pulled the DMD driver board out and it is pretty burned up, I swapped in a known working DMD driver board but when I do that, the game won't even get to attract mode, it just turns on GI. I've tried a different MPU and Driver board as well but the problems seem to stay with the cabinet.

Ok update as I've been messing with it.

I tested the DMD and the DMD driver board in another game and the DMD was dead. The DMD driver board worked perfectly in another game. I have a spare DMD that I have installed and it's showing this when the game boots up.

F104 is blowing instantly now. Flippers are still firing on.
Still no sound.

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I was thinking Bridge Rectifier as well for the 20v.

Does the 20v control sound or DMD at all?

Oh and yes the ribbon cables are on right. I swapped the smaller DMD one with a known good working one and it wasn't that either.

Here is the photo of the MPU that's currently in it. I've tried two different ones with exact same result.

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I tried a different Power Driver board again and it was powering the 20v correctly. So I do believe the BR to be bad. I'll have to research it tomorrow to see which one powers the 20v. I didn't get any extra life like audio or display though. Also blowing fuses more than I would like, I'll have to make up some more circuit breakers to figure this one out.

Oh yeah, sorry I didn't make that clear. I knew F104 was for 9-16. I saw the Trough kicking on instantly, I repaired that solenoid but F104 is still blowing so probably another bad diode or transistor somewhere else in 9-16. Also F105 blowing too which I think said was another group of solenoids. Had to call it a night on this one but if anyone thinks of anything for me to look up it would be appreciated.