Is there anything that it could have touched or be touching underneath the playfield?
I think you should edit your last post to "there's never a problem unless I touch it.". ;-)
Good point! I do have the knack 
The solder could be touching a post. I'm not sure but that's about all it could be I think. I'll check tomorrow.
Let me know how you go. I will be away next weekend with work. If you need a hand with it just give me a yell.
