I read your story and some of the details are a bit unclear to me. You say your wii opens to a white system menu. What do you mean with this? Do you mean to say the screen remains completely white? Or did you mean something else?
Are you using 3rd party controllers or official ones from Nintendo? Did you try using other controllers, to eliminate the possibility of the controllers being broken? Did you check the batteries? Did you try syncing the controllers?