thumbscrew won't come out
 

I noticed that one side of my binding is loose. The thumbscrew won't tighten or loosen to come out. Any suggestions how to get it out?

wd40?
let it sit for a min, an then try.

also, it turns but there is no vertical movement.

try the wd40, wiggle it a lil bit, let it sit, try again.... id go for pliers next...

If it is turning with no vertical moviment it sounds like the threads may have come loose from the board. I have no idea how common this is but from what you are describing thats what it sounds like. Otherwise, PB blaster is the best stuff out there, its not the prettiest but it works wonders!

How old is the board and bindings? Warranty maybe?

Good luck

It could also be that the plastic head of the thumbscrew came loose from shank of the bolt. If that were the case I would try to pull the head off and put some vice graps on the shank to back it out of the board.

White Liquid Force thumb screw? Put vice grips on the plastic part of the thumb screw to loosen it up. If that does not work break the plastic off. Usually there is an allen head screw in the plastic piece. Good luck.