Williams Firepower (Williams, 1980) slingshot issue

[spalmer]

I am having a strange issue with the left slingshot on a Firepower I recently purchased. The left slingshot soil seems to be partially energize at game start. During game play if the slingshot is hit, the coil locks out but and be pushed back in by hand. During game play mode, if you pull the slingshot out by hand, it locks but can be pushed back in. However during attact mode, an is fine. You can even ground the tab on the Transistor and the slingshot fires without locking. Had this problem when I bought it but when I got home it was fine. Removed boards last night to replace a lamp resistor and the issue started again when I put the board back in. Am I dealing with a problem with the 40 pin connector or do you think it could be something else. Any ideas are welcome and appreciated.