If FirstChip MP Tool fails, consider:
| Error | Likely Cause | Solution | |-------|--------------|----------| | Device not found | Driver not installed / USB 3.0 port | Reinstall driver, use USB 2.0 | | CheckSum Fail | Wrong tool version | Find exact match for controller | | Bad Block too many | NAND worn out or fake capacity | Reduce capacity setting | | ISP download fail | Incorrect flash type | Auto-detect flash (if supported) | | Write table fail | Bad contact or dying NAND | Try different USB port, lower speed | | Timeout | Power fluctuation | Use powered USB hub | firstchip mptools