XMancs

@floxi I saw that video earlier, and unfortunately the method mentioned in it requires the system to at least boot up. Mine does not boot up anymore

@BulkSlash Thank you for your quick response. I am sorry to hear that basically my old Wii U will remain a brick
If there would be a way to dump the corrupted NAND and fix it...

@BulkSlash What if I bought another Wii U since the first broke, and I backup the new one and try to reflash the old one with that?