Screen is floppy on dell inspiron e1505

I got my dell e1505 just over 3 years ago, and it works great. the only problem is that the screen has gotten all floppy. if i move it, it's like loose or something and wehen i let go it falls back to what it just was. if i move it further, then it will catch on and start moving whatever is inside, and when i let go, it falls back again, but not as far. sometimes when i move it, it seems like it needs to click back into place. Has anyone come across this, and does anyone know how to fix it? i took the little plate above the keyboard off once (the one that says inspiron e1505) and looked for a loose screw or something out of place, but i couldn't find anything.

anyone have any ideas?

thanks.