I wanted to thank everyone that had a hand in encouragement and helpful hints to rectify my locked coil issue. It turned out to be a lighting mod that I purchased and installed in the game. It did not even occur to me that I had just installed the mod and upon power up the game, that the coil was stuck , all my focus was on reacting to the noise and then eventually smoke that appeared in the playfield.
So I was prepared to install a socket in the U2 location , as I disconnected the new connections for the mod at 116 and 122, i thought that this all happened right after i put this in- so I checked the voltage on 124 pin 3 and all was correct. I hooked up the molex connecter under the playfield right under the coil 27 and sure enough back to normal. I proceeded to run through all the solenoids in the test menu- and everything worked perfectly. I never even got to enjoy the new mod- but it is not going back in my game.
I did contact the supplier and told them my findings- they spoke with their engineers and and assured me that all these are bench tested prior to release- I am certain that this takes place. All I know for sure is that my game did not like it- there must be some kind of weird back feed from the LED light or driver that toggles the Q22 transistor.
I am sending it back for them to look at and test. If it proves to be functional- guess I will try to sell it. There may just be something peculiar with my game and any of its modifications that may have occurred over the past 23 year. I don't know the history of the game- but it appears to have spent some time in the Netherlands , as there is a sticker on the Apron and the manual is all marked up with reference to Holland.
I do not want to mention the supplier or hold the individual mod up for ridicule- as most likely it is just my game that may have the issue.I can play the game and it plays perfect as intended- no errors or resets, able to complete LITZ- and that is truly all I really care about.
I was only curious if anyone ever had a similar thing happen- not necessarily with TZ, but just the game went haywire after making a connection to a similar modification to the game.
Thanks again everyone.