My bandmate bought this old 12ver off CL. He said it was tuned 1/2 step flat so he tuned it up to standard and after strunning it just a few times, there was a loud popping noise and the action came way up. Its not really playable now up past the 1st few frets. He brought it to band practice for me to look over. We took the strings off and looked inside w a mirror. Appears its a bolt on neck. The neck sticks thru a hole in the body, like a tenon, and there appears to be a bolt of some sort securing it. Hard to see really well because of a big old top brace in the way. The joint seems solid, ie no wiggle or play. I cant really tell if its moved or not because I didnt see it before the movement, but it looks normal for tolerances on something like this. He asked me to take it home and see if I could figure out what happened.
Im gonna remove the truss rod cover and see if the truss rod works. It doesnt appear to have failed as the neck looks to have normal relief.
When I get the time to get it out, I'll post some pics. Ill try to get the inside and exterior neck joint, put a straight edge on the neck and capture that, and whatever else anyone might like to see to help me out.
Anybody have any other ideas? If the neck joint has moved, how hard is it to re-set these things?