As simple as the title suggests. I've been handed a Wii by a friend of mine who wanted me to install HBC and all, only to find that it got semi bricked without having any kind of homebrew whatsoever. The system menu is in Japanese and I can't get to the settings menu as you've already guessed. All tutorials I found speak of installing bannerbomb which isn't working (thus concluded it's on 4.3) and gave absolutely no reaction once accessed the SD card. Installing letterbomb requires MAC address and I can't reach that in my state. Please help me, templars!!!