There's a step-by-step guide available at http://www.lcdpart.com/images/ViewSonic_VX900.pdf

Hi...there,
Ok! first unscrew all the screws and place your monitor screen upward on a table. place a piece of soft clothes over the screen so you won't get any fingers all over the panel. Now gently get a good grips on the edge of the bezel with both hands and used a little of forces to lifted up the bezel up...Do the same procedures on the other sides... Now the bezel are off... move to removed the speaker bezel. After that just used a phillip screw driver to removed the screws... the rest you can unglugged all the cables....