Separate the display from the bezel.

The display is glued to the bezel. Using your plastic tool, carefully go around the bezel to separate.

HP didn't use screws on these. Instead, they used plastic from the bezel and melted it to cover the holes. These plastic dots will need to shaved off. It will take a metal edge to do it.

Use caution while separating the screen from the bezel. The bezel is made from very thin plastic, and will crack easily if too much pressure is applied.