wii troubles

whenever i try and turn my wii on the red light just turns green and then i get no audio or picture on my tv. wii remotes wont sync and i can only turn it off by holding the power button down. it still loads and ejects discs, but they only spin for a few seconds and then stop. i checked all wiring and ports and even unplugged and let it set several times for several minutes before trying again and still the same thing. it just happened tonight after i tried to play the conduit and updated it. my wii system is not a modded systems and was firmware 3.1. does anyone have any ideas other then nintendo’s repair center to fix this?