I'm not entirely sure what happened either. I was playing a Gamecube game, I turned off my Wii and when I turned it back on, System Menu Corrupted message. I can still boot into Preloader and I have Bootmii installed on to Boot2, but I don't want to use it because my NAND dump because I did it a pretty long time ago and don't want to undo everything I've done since then. What would be the best way to diagnose and fix whatever semibricked my Wii? I can get into Homebrew Channel through Preloader, but I cannot get into Sys Menu.