Take a moment to look at the Black strips, the middle image shows the bottom strip. Since you have unplugged the TV from the mains, but have not disconnected the wires, lifting up the TV you can tell if your looking at the Top or bottom as the mains cable locks the orientation.

The bottom strip has nice sloped groves in it whilst the top doesent. These two long strips are installed first. followed by the side strips.

Pay extra attention to this part. There should be a tiny recess the LCD pannel fit's into all arround. ensure this is smooth before the next steps. This should lock this section in place. Now flip the screen over and unplug the mains power lead. then remove the TV from the back. As the next part is tricky.