| Symptom | Most likely cause | |---------|--------------------| | “No device found” | Driver not installed correctly / Windows updated and replaced driver | | “USB Error 5” | Access denied → run as administrator | | “Firmware update failed” | Clone has locked PIC/STM; can’t be updated via USB | | Programmer heats up | Short on target or clone has wrong resistor values | | Reads all FF or 00 | Wrong voltage or target not powered correctly |
This is where most guides fail. Windows 10 cuts power to the USB port to save energy, corrupting your read/write.
| Symptom | Most likely cause | |---------|--------------------| | “No device found” | Driver not installed correctly / Windows updated and replaced driver | | “USB Error 5” | Access denied → run as administrator | | “Firmware update failed” | Clone has locked PIC/STM; can’t be updated via USB | | Programmer heats up | Short on target or clone has wrong resistor values | | Reads all FF or 00 | Wrong voltage or target not powered correctly |
This is where most guides fail. Windows 10 cuts power to the USB port to save energy, corrupting your read/write. how to install xprog 555 on windows 10 better