The chip may require a higher programming voltage than your USB port can provide. Try using a powered USB hub. Alternatively, the chip might be locked, damaged, or requires a thorough UV erase cycle if it is an older ceramic EPROM. Software Crashes on Launch
: Includes support for common chips such as 27c series EPROMs, Atmel ATtiny and ATmega microcontrollers, and I2C EEPROMs (e.g., M24c08). Installation & Troubleshooting Top2049 Universal Programmer Software Download
(Windows 10/11 only):
The software can often auto-identify inserted chips, minimizing the risk of incorrect voltage or timing settings. The chip may require a higher programming voltage