You could try Savemii or Savemiifrii (google it if you are not familiar with it) but the rescue menu probably will not load. However, if it does, you could insert a newer game and it will install the update from that game (only if your system menu is not 2.x). Otherwise, you could install a mod chip, burn an autoboot WAD Import disc, and install a new system menu and its IOS (if your system menu is 3.2 or lower).
If nothing happens with Savemii, which is very likely, but your wii is old enough to install Bootmii as Boot2, you can manually install Bootmii with a hardware NAND programmer, get the keys, convert another NAND dump to work on your wii, and flash it to your wii to fix it. This is the only way it can be fixed.
Edited 2 time(s). Last edit at 01/15/2010 03:20AM by jbc007.