you probably should look at the remote board and the video cables before you rotate. Make sure there is room to move (or disconnect the monitor before you rotate)
Make sure all 6 screws(well, atleast 4) are securing the monitor to the wood brackets. I have seen some ops trust gravity with 2 screws before.
When you remove the glass, wood bezel and paper bezel, you will see the wing nuts holding the wood brackets. The wood pieces make it square so it all fit when you rotate it.