Notebook computer in the power-on state often flip screen to the notebook hurt?
1. If you're just flipping, it's perfectly fine. General notebook of the screen shaft before the factory has been tested, the life of the rotating shaft is often far more than the life of some major hardware, that is, as long as you do not often at hundreds of times per minute screen, generally until the notebook scrap will not have any problems, Although I also have encountered the flip screen when the screen flashes, this is generally the shaft inside the screen wiring caused by bad contact, but most of the notebook is completely no problem.
2. As you said the Power-on state flip screen will not cause any damage, but if you like to force "snapped!~" of a closed screen, it is another matter, the excessive force of the screen will lead to a strong impact and vibration, if the hard drive is reading and writing operations can easily lead to data loss, bad way or even directly damaged ( Of course, if you use a solid state drive is OK ~), if the strength of the words may also damage BC surface shell or screen ~ But in reality I have not seen such a high intelligent creature, so generally will not have a problem ~
In short, the notebook is not as fragile as you think