Post some pictures of the rectifier board which is the smaller board above the transformer in the back box.

There's a 1 amp slow blow fuse near the flipper mechanisms under the playfield - it might be blown if none of the playfield solenoids are working.

Connectors for GI is a very common problem for this vintage Bally.

I suggest you go to pinwiki and look over the Bally section - there's tons of detailed information about the Bally boards and how they are supposed to work.

I also like http://techniek.flipperwinkel.nl/ballyss/rep/index1.htm for a step by step process - read through it - I think it will be a big help too. Good luck, and let us know how its going.

It looks like you are missing about 37 volts. Trace the circuit from the AC output of the transformer to the output going to the Solenoids and figure out why the voltage is so low.

Since the machine has never worked for you or the previous owner, I am going to assume you have a wiring issue.

Verify you have the proper AC voltage from the transformer into the rottendog board for the 43 volt section. If so, then we can narrow it down to something on the board.

With the coil voltage low, I don’t understand how the chimes would work on startup.

Just an off chance - is the ground braid properly tied together? You should see a braid running across the bottom of the back box and another braid coming up from the cabinet that is electrically tied together by a wing nut on a stud or a screw through them and into the wood of the back box.

Let us know.

If it happens again, check the tension on the fuse holder. Bally machines are notorious for fuse holders going bad.