| Problem | Likely Cause | Solution | |---------|--------------|----------| | Tool doesn’t detect printer | Wrong USB driver | Install or WinUSB via Zadig | | “Access denied” error | Not in Service Mode | Re-enter service mode carefully | | Antivirus deletes .exe | False positive | Add folder to exclusion list | | Reset works but error returns | EEPROM write failure | Try a different tool or older version | | Printer still shows error | Physical pad full | Replace waste ink pad or route to external bottle |