Cause: The drive is in "panic mode" due to bad blocks. Solution: Short the NAND pins temporarily (advanced technique). Alternatively, run MPALL with the "Preformat" jumper tick box enabled.
For a technician holding a dead SD card or an unrecognized eMMC chip, MPALL v3700E offers several vital functions:
Why isn't this tool widely advertised? Because it is dangerous.
Backup your data first. This tool is for recovery, not data preservation. It will erase everything.