I did some more poking around and discovered that the speakers spark back to life way more frequently during game play and more prone to staying on. Ok it only happened once and came inside to report this. I got a whole (short) game with game full audio but it went away as the game ended. The audio was really loud for level 18 and too loud for night time garage play on level 9 (which is the minimum volume as per instructions from a previous owner and pin-wiki) Come to think of it I may have always suffered from that "Too LOUD" problem I have seen here on similar WPC titles. I have always had to keep the volume low (usually 5-8) which seems like too low of a setting for the volume emitted. The sound quality also sounds not up to par, way scratchy with distortion on level 12.
It also comes to life only when everything is installed like play field glass and not while jiggling wires with the play field up or in the back box.
Just giving an update on my progress as some of these systems I have listed may have happened to someone else on a WPC title.
The sound is currently working but is not 100% as it cut out a bit when I fiddle with the coin door.
Are there any tests that I can do while I have sound to narrow down what needs attention vs re-flowing solder on every connector. Sure its on my list of things to do but id rather invite some friends and family over to play my very first pin instead of diving head first into a project like that my first week of owning my first pin.
I poked around further after I discovered that I should put in into sound test mode so there is always sound or music playing and finally found the culprit.... It was a loose sub speaker wire at the speaker connection.
Thank you pinsiders for all the help. The sound is still terribly loud, so loud that I taped cardboard over all the speaker holes because even #9 is too loud....and this is coming from a younger guy with JL Audio subs in all his vehicles.