| Error in tool | Likely cause | Fix | |---------------|--------------|-----| | Timeout (0x2001) | Wrong service mode, bad USB cable | Re-enter service mode, try different port | | EEPROM mismatch | Tool version vs printer region mismatch | Use correct regional version of tool | | Write failed (0x5005) | EEPROM write-protected | Perform full power cycle, retry | | Firmware not compatible | .upd file for different model | Double-check model number in printer info |