marcansoft writes "On September 28, Nintendo released a Wii update, titled 4.2.This update was targeted squarely at homebrew, performing sweeping changes throughout the system.Also, if you are using Preloader and you "dop" IOS60 or IOS70 or IOS80, remember to reinstall Preloader after "doping"; otherwise, you won't be able to load the System Menu.Instead, boot HBC through Preloader to reinstall it.Instead of updating your Wii firmware, you can just use DOP-Mii to update specific channels such as the Nintendo Channel or Wii Shop Channel (which also requires an IOS61 update) without updating the Wii Sytem Menu.This will allow you to shop with the latest Wii Shop Channel without updating the Wii System Menu.During Boot Mii's development, its authors noticed that Nintendo's code had critical bugs and could sometimes permanently brick a console by writing incorrect or unchecked data to flash memory, so they decided to write their own, much safer flashing code.Now, Nintendo has pushed a boot2 update to all Wii users, and the results are what was expected: users are reporting bricks after installing 4.2 on unmodified consoles.
The update hasn't hindered this, as users can simply reinstall Boot Mii after updating (it is compatible with the update).
The term is often used in situations where modifying a system's firmware (without necessarily making any alterations to the machine's hardware) has caused it to become inoperable.
A Semi/Partial Brick occurs when a System Menu update from the wrong region is installed on a Wii or some resources have been otherwise damaged, breaking some (but not all) of the functionality of the System Menu.
The current version of the Wii Speak Channel will not be able to communicate with the updated version.
All parties using the Wii Speak Channel will need to complete this update for continued operation.