It has been reported by multiple users across several online communities that their Wii U consoles are no longer functioning properly. The error codes 160-0103 and 160-2155 are the dreaded indicators of memory corruption. It has been discovered that the NAND Flash within the Wii U's internal eMMC is prone to failure. According to details gleaned from teardowns of the console's hardware, Nintendo has implemented either Toshiba or Samsung flash storage boards for the various revisions of the console. There has been an uptick in the rate of bricked Wii U consoles across recent months, but the problems seem to have occurred as far back as 2015, according to archived posts on the GBA Temp forum . It is speculated that leaving the Wii U inactive for long periods of time can lead to the memory corruption issues.