As was said there are usually covers over the screws. They typical look like rubber bumpers that are there to keep the screen from scratching the laptop base.
I have seen some newer model laptops with no screws, Cheapskates!
Those you grab the bezel on the inside where the screen is and lift it up gently until the plastic clips release, then work around the inside of the bezel until it is off.
But first look for two to six screws under cosmetic covers. Be careful they have a habit of flying away when being removed.
Once the screws are removed you are back to grabbing the inside edge of the bezel and lifting it up until the plastic clips release.
Being very gentle as they break easy.
Another place to look. many times people post a video of this sort of repair on Youtube.
Edited by rotor123, 16 February 2012 - 05:17 PM.