If you've got Ergo Ensis-S laptops it's worthwhile just checking to see if any of them are loose around the hinge area.

You need to pop out the 5 rubber buffers around the screen and then you can undo th 5 screws hidden underneath.

Once this is done you can gently prise the surround off and you will see the internal metal fixings that may have come loose.

Tighten all of these screws and then reassemble.

I've got 3 of these like this and they are actually now past the point of tightening up the screws to fix them because the plastic is cracking etc...

I'm trying to find out if replacement screens backs are available for these.