Moved this topic to the support forum and changed your title. It looks like you have a firmware issue. You can try resetting it again if you can get there or contact LG support.
See reset video. http://www.lg.com/us/support/video-tutorials/CT10000018-1441914092672-input-selection
Sorry, small correction to what I said... it's NOT WebOS 2.0 ! It's still WebOS 1.4.0-2320, which is definitely NOT WebOS 2.0, even if they applied part of the changes they did for WebOS 2.0 ! I'm totally pissed because now I cannot install Molotov, a french application for streaming TV which is also available on Apple TV 4... I HATE LG !!!