[ChipD] successfully installed two NAND flash chips into his Wii. He can keep the stock firmware on one and then flip a switch if he wants to boot using the other chip with a modified firmware.

plus a $25 NAND recovery kit called NAND-AID—there are no guarantees that these methods will be effective. Instead, Wii U users should plug in their consoles, power them up, and ensure that apps ...