Tighten hinge on 27" Cinema Display?
There are 2 methods to do that.

1- Mechanical

2-Chemical


for mechanical take the screw out and bring it to your hardware store, they will give you tongued washers or claw washers that prevents the screw from loosening.


The pro for this method is you can loosen the screw.


for Chemical method go to your hardware store and get the glue (for the screw).


The negative, it will be extremely hard to remove the screw.