Ok, so I've got a pretty common problem - I just can't find the solution. Everyone says: pull the tab cover off, tighten screw....what they fail to note is WHAT screw. My Dell C610's screen will fall forward or backwards if it is not perfectly perpendicular - any deviation and it simply falls. I've taken the tab off, unscrewed the hinges, opened up the screen...I simply cannot figure out which "screw" I'm supposed to tighten to get this to stop. Any help is much appreciated.