Gentlemen (and ladies),
I have a problem withe the ball lock coil locking on. I have narrowed it down to the CPU board (swapping boards) and looking for some further help or advise on narrowing it down some more.
History: at some point in the past the batteries had leaked on the board and that has been cleaned up and all the IC's below the holder have been socketed and replaced. GI lighting is intermittent - which is also a problem with this CPU board.
Now, from what I can gather from the drawings, it looks like either U20 (ULN2803A) or U4 (68B09EP CPU) can be the issues, but wanted to check here with someone that may have more experience at WPC CPU board repair than me on their thoughts (maybe I am out in left field?). Any comments on the GI lighting "section" would be helpful as well.
Thank you in advance for any help/suggestions.