When I turn my Sony Bravia on it flashes onto the channel for about 5 seconds then it goes blank, I still have access to the guide, but no channels work and when I try to change it stays on channel 3, I have access to the tv menus and the likes of Netflix, YouTube and all the apps, but none of the input she work and my Apple TV does not come up when I switch to that input, the LED at the bottom is white and always small (does not enlarge when on channel).