Hi, just bought me Samsung 75 TV QE750GN…. and installed cable directly in the tv via the tv box that came with the tv. TV box that came with tv I have also connected appletv4 and samsung soundboard. Have chosen the correct country which is Norway and configuration started ,, after about 2 min the screen goes black and can only hear sound, just invisible apps at the bottom of the image. Have check that all cables are plugged in correctly and also disconnected from power and on again. Is not possible to use the remote control and can not see which app tv is possibly on .. Anyone know what errors may be or how I can reset tv / factory reset tv? Something that can be solved easily or I have to deliver the TV back to the store again.