For your voltage measurements, you can put the negative (black) lead to a test point labeled ground or attach it under the ground braid at the base of the head.

Also, there’s a ground junction point in the base of the head. There’s one braid that goes from one side to the other, and another braid that comes up through the hole that the cables from the play field come up from and attach to the circuit boards. Make sure that junction is tight.

You mentioned the machine is imported from England. Is your house power the same as in England? Likely not a problem, but just something else to check.

Also, how do the connectors look at the rectifier board? Maybe post a pic so we can see.

I still lean toward connector issues since there’s a Altek board, and the machine has been in storage.

On the rectifier board, verify the fuse clips have decent tension. Bally made their own clips and they tend to fail.

I only say this because you got lights, etc. when you touched (flexed) something on that board. That should not happen.

Wayout440 -

Please clarify your comment about the ground braid. If the braid that comes up through the neck is not connected to the ground braid that runs horizontal across the neck, the machine will not operate.

I had a machine that I could not get any voltage, and ultimately, the reason was because someone had removed the ground braid that comes up through the neck. Had it not been for Vid1900, that machine would probably still be frustrating me.

Correct board, follow GreatwichJohn's advice. Also, before starting, take lots of pictures. Nothing worse than getting in the middle of a transfer and then question your memory.

Since you found one pin on the wrong place, I highly recommend checking every connector to verify the pin outs are correct.

It sounds like you may have dodged a bullet with that wire in the wrong spot.

If the flashing lights you are referring to are in the head, those lights are controlled by the aux light board.

The connector in your picture (J3 to SDB?) appears to have corrosion on the pins. Unless the green is reflection, I think you need to repin that connector, and possibly replace the connector body, since it looks like something melted on it at pin 10.