Nintendo has altered the hardware components of new Wii units in an attempt to block the use of currently available modchips that enable users to play copied games. The new units are part of a new shipment of Wiis and contain an altered circuit layout that makes modification much more difficult than with the earlier versions of the console.
Nintendo, Sony and Microsoft have all altered the circuitry of their consoles before to combat against modding.
Source:
DigiTimes












