- The Wii U was stuck at the logo screen due to internal storage failure.
- Used a Raspberry Pi Pico with UDPIH exploit to access recovery tools.
- Diagnosed the problem as Hynix eMMC media errors in the MLC storage.
- Ruled out coldboot, ECO, and region mismatch issues using system logs.
- Installed ISFShax to gain early boot environment without soldering.
- Configured redNAND to redirect MLC storage to an SD card partition.
- Rebuilt the system titles using official USA MLC set and setup plugins.
- Verified recovery via logs and successfully booted to initial setup screen.
- The console now requires the SD card to remain inserted for operation.
- Key lesson: logo hangs can have multiple causes; logs are essential for diagnosis.