After turning on Wii, i press A to skip health and safety warning and all i get is a black screen. It was working fine a couple of days ago. All cabled are in check and working, i get the sound effect upon pressing A and can read the health and safety warning on the screen. But afterwards only a black screen? Wii has never been modded, bought myself from a shop (GAME) brand new. Any way to work out the problem?