The failure I've seen is because the screen flip signal which is needed when we rotate the screen is broke in some way. The problem is that it is not user serviceable and those that can fix it don't ask how in forums. I am not trying to upset you but my advice is to use it and not get it fixed.
The display screen when open has turned upside down but the camcorder works ok otherwise. ive tried going thro all the menus and turning off n on taking battery out recharging etc but nothing has works Is there a combo of buttons to access a sub menu to fix this. ive heard this has happened with other people but I have no solution also is ti woth trying to fix this or just best to get a new camcorder